Shared Flashcard Set

Details

MRIS 103 MedTerm
Vocabulary Words
2281
Health Care
Professional
09/10/2009

Additional Health Care Flashcards

 


 

Cards

Term
ACE inhibitor
Definition
Drug that causes dilation of blood vessels and lowers blood pressure, prevents heart attacks, strokes, and congestive heart failure. ACE stands for angiotensin-converting enzyme, which normally constricts blood vessels.
Term
Addison disease
Definition
hypofunctioning of the adrenal cortex; decreased secretion of aldosterone and cortisol producing hyperpigmentation (bronzing of skin)
Term
Alzheimer disease (AD)
Definition
brain disorder marked by gradual and progressive mental deterioration (dementia) with personality changes and impairment of daily functioning
Term
Apgar score
Definition
system of scoring an infant's physical condition 1 and 5 minutes after birth. Heart rate, respiration, color, muscle tone, and response to stimuli each are rated 0, 1, or 2.
Term
B cell
Definition
a lymphocyte that originates in bone marrow and transforms into a plasma cell to secrete antibodies
Term
BNP test
Definition
measurement of BNP (brain natriuretic peptide) in blood. This test identifies patients at risk for major complications after MI and with CHF.
Term
Babinski's sign
Definition
an extensor (dorsiflexion) movement of the great toe with fanning of the other toes when the outer sole of the foot is stroked from the heel forward. All toes bend downward normally. Indication of CNS abnormality.
Term
Bartholin glands
Definition
small mucus-secreting exocrine glands at the vaginal orifice (opening to outside the body)
Term
Battle's sign
Definition
subcutaneous blood over the mastoid. Evidenced as bruising behind and below the ear. Suggests basal skull fracture.
Term
Bell palsy
Definition
unilateral paralysis of the face caused by a disorder of the facial nerve
Term
Bowman capsule
Definition
enclosing structure surrounding each glomerulus
Term
Broca's area
Definition
speech center located in the frontal lobe of the dominant cerebral hemisphere. Injury here produces inability to talk, even though the person knows what he/she wants to say.
Term
CA-125 test
Definition
protein marker test to detect ovarian cancer cells in blood
Term
CD4+ lymphocytes
Definition
helper T cells that carry the CD4+ protein antigen on their surface
Term
CEA test
Definition
blood test for carcinoembryonic antigen (marker for GI cancer)
Term
Cheyne-Stokes respirations
Definition
rhythmic changes in the depth of breathing. The pattern occurs every 45 seconds to 3 minutes. Cause may be heart failure or brain damage.
Term
Chlamydia infection
Definition
(STD) bacteria (Chlamydia trachomatis) invade the urethra and reproductive tract in men and women
Term
Colles fracture
Definition
broken bone occurring in the wrist at the lower end of the radius
Term
Crohn disease (Crohn's)
Definition
chronic inflammation of the intestinal tract (terminal ileum and colon); a form of inflammatory bowel disease (IBD)
Term
Cushing syndrome
Definition
group of symptoms produced by excess cortisol from the adrenal cortex; obesity, hyperglycemia, excess fat deposition in the body and face (moon face). Most cases result from prolonged administration of steroids
Term
Doppler ultrasound
Definition
method of focusing sound waves on blood vessels to measure blood flow
Term
Down syndrome
Definition
chromosomal abnormality results in mental retardation, retarded growth, a flat face with a short nose, low-set ears, and slanted eyes
Term
ELISA
Definition
test to detect anti-HIV antibodies in blood. This is a screening test for AIDS.
Term
Ewing sarcoma
Definition
malignant bone tumor occurring in children; often involving the entire shaft of a long bone
Term
Food and Drug Administration (FDA)
Definition
Governmental agency having the legal responsibility for deciding whether a drug may be distributed and sold, and charged with enforcing proper drug manufacture and clinical use.
Term
GERD
Definition
GastroEsophageal Reflux Disease
Term
Graves disease
Definition
hyperfuctioning of the thyroid gland; thyrotoxicosis. This is the most common type of hyperthyroidism with exophthalmos often present. Condition is treated via antithyroid drugs.
Term
Hodgkin disease
Definition
malignant tumor of lymphatic tissue in the spleen and lymph nodes
Term
Holter monitoring
Definition
compact version of an electrocardiogram is worn during a 24-hour period to detect cardiac arrhythmias
Term
Hospital Formulary
Definition
The most complete and up-to-date listing, which gives information about the characteristics of drugs and their clinical usage (application to patient care) as approved by that particular hospital.
Term
Huntington disease
Definition
hereditary disorder marked by degenerative changes in the cerebrum leading to abrupt involuntary (choreic) movements and mental deterioration
Term
Lyme disease
Definition
chronic, recurrent disorder marked by severe arthritis, myalgias, malaise, neurologic and cardiac symptoms caused by a deer tick
Term
Meniere disease
Definition
disorder of the labyrinth of the inner ear; elevated endolymph (fluid) pressure
Term
PSA test
Definition
blood test that measures levels of prostate-specific antigen (PSA) related to prostate cancer
Term
Parkinson disease (parkinsonism)
Definition
degeneration of neurons in the basal ganglia, occurring in later life and leading to tremors, weakness of muscles, and slowness of movement
Term
Physicians' Desk Reference (PDR)
Definition
privately published reference with several different indices to identify drugs, along with precautions, warnings about side effects and information about the recommended dosage and administration of each drug
Term
Raynaud disease
Definition
recurrent episodes of pallor and cyanosis in fingers and toes caused by blood vessel spasms
Term
Rh factor
Definition
antigen (protein) on red blood cells of Rh positive individuals
Term
Romberg's test
Definition
a test of balance (cerebellar function). Patient loses balance when standing erect, feet together, and eyes closed.
Term
SERM
Definition
Selective Estrogen Receptor Modulator that increases bone mineral density and decreases cholesterol levels
Term
T cell
Definition
lymphocyte originating in the thymus gland and destroys antigens by direct action or production of cytokines such as interferons and interleukins
Term
Tourette syndrome
Definition
involuntary, spasmodic, twitching movements; uncontrolled vocal sounds; and inappropriate words
Term
United States Pharmacopeia (USP)
Definition
independent review committee that publishes an authoritative list of drugs, formulas, and preparations that sets a standard for drug manufacturing and dispensing. Approved drugs are tested for safety, effectiveness, and purity.
Term
Wilms tumor
Definition
malignant tumor of the kidney occurring in childhood
Term
abdomen
Definition
area of the body between the chest and pelvis region
Term
abdominal cavity
Definition
area of the body between the chest and pelvis (hip region)
Term
abdominal ultrasonography
Definition
sound waves beamed into the abdomen produce an image of abdominal viscera. Especially useful for examination of fluid-filled structures like the gallbladder.
Term
abdominocentesis
Definition
surgical puncture to remove fluid from the abdomen
Term
abduction
Definition
muscle movement away from the midline of the body
Term
abductor
Definition
muscle that leads a limb away from the body
Term
ablation
Definition
removal of a body part or the destruction of its function, as by a surgical procedure or morbid process, or the presence or application of a noxious substance
Term
abortion
Definition
spontaneous or induced termination of pregnancy before the embryo or fetus can exist on its own
Term
abruptio placentae
Definition
premature separation of the implanted placenta
Term
abscess
Definition
a walled-off area of infection that can be difficult to penetrate with antibiotics. Surgical draining of an abscess usually is necessary.
Term
absence seizure (petit mall seizure)
Definition
minor form of seizure, consisting of momentary clouding of consciousness and loss of awareness of surroundings
Term
absorption
Definition
passage of materials through the walls of the small intestine into the bloodstream
Term
accommodation
Definition
normal adjustment of the eye to focus on objects from far to near
Term
acetabulum
Definition
rounded depression or socket in the pelvis, which joins the femur forming the hip joint
Term
acetylcholine
Definition
a neurotransmitter chemical released at the ends (synapses) of nerve cells; chemical found in myoneural space
Term
achalasia
Definition
failure of the lower esophagus sphincter (LES) muscle to relax
Term
achlorhydria
Definition
absence of hydrochloric acid in the gastric juice
Term
achondroplasia
Definition
inherited disorder in which the bones of the arms and legs fail to grow to normal size due to a disorder of cartilage formation in the fetus; achondroplastic dwarf
Term
acne
Definition
chronic papular and pustular eruption of the skin with increased production of sebum
Term
acoustic
Definition
pertaining to hearing
Term
acoustic neuroma
Definition
benign tumor arising from the acoustic nerve
Term
acquired immunity
Definition
formation of antibodies and lymphocytes after exposure to an antigen
Term
acquired immunodeficiency syndrome (AIDS)
Definition
depression or suppression of the immune system after exposure to the human immunodeficiency virus (HIV); marked by opportunistic infections, secondary neoplasms, and neurologic problems
Term
acromegaly
Definition
enlargement of extremities due to increased secretion of growth hormone from the anterior pituitary gland
Term
acromion
Definition
outward extension of the shoulder blade forming the point of the shoulder
Term
acrophobia
Definition
fear of heights
Term
actinic keratosis
Definition
thickened area of epidermis associated with aging and skin damage due to sun exposure
Term
acute
Definition
having a rapid onset, severe symptoms and a short duration
Term
acute coronary syndromes
Definition
consequences of plaque rupture in coronary arteries; unstable angina and myocardial infarction (heart attack)
Term
acute lymphocytic leukemia
Definition
malignant, immature lymphocytes multiply in the blood, bone marrow, and lymphatic system
Term
acute myelogenous leukemia
Definition
malignant, immature granulocytes called myeloblasts multiply in the bone marrow and bloodstream
Term
addiction
Definition
physical and psychologic dependence on and craving for a drug
Term
additive action
Definition
combination of two similar drugs is equal to the sum of the effects of each
Term
adduction
Definition
muscle movement toward the midline of the body
Term
adductor
Definition
muscle that leads a limb toward the body
Term
adenectomy
Definition
excision of a gland
Term
adenitis
Definition
inflammation of a gland
Term
adenocarcinoma
Definition
cancerous tumor of glandular tissue
Term
adenohypophysis
Definition
anterior lobe of the pituitary gland
Term
adenoid hypertrophy
Definition
increased development of adenoids
Term
adenoidectomy
Definition
removal of the adenoids
Term
adenoids
Definition
small masses of lymphatic tissue in the nasopharynx close to the nasal passageway
Term
adenoma
Definition
tumor of a gland. Benign tumors of epithelial or glandular origin are usually designated by this term.
Term
adenopathy
Definition
disease condition of glands
Term
adipose
Definition
pertaining to (or full of) fat
Term
adjuvant therapy
Definition
assisting primary treatment. Drugs are given early in the course of treatment, along with surgery or radiation to attack cancer cells that may be too small to be detected by diagnostic techniques.
Term
adnexa uteri
Definition
fallopian tubes, ovaries, and supporting ligaments
Term
adrenal cortex
Definition
outer section of each adrenal gland; secretes cortisol, aldosterone, and sex hormones
Term
adrenal glands
Definition
endocrine glands above the kidney
Term
adrenal medulla
Definition
inner section of each adrenal gland; secretes epinephrine and norepinephrine
Term
adrenal virilism
Definition
excessive secretion of adrenal androgens
Term
adrenalectomy
Definition
excision of an adrenal gland
Term
adrenaline (epinephrine)
Definition
secreted by the adrenal medulla; increases heart rate and blood pressure
Term
adrenocorticotropic hormone (ACTH) (adrenocorticotropin)
Definition
secretion from the anterior lobe of the pituitary gland; stimulates the adrenal cortex
Term
adrenopathy
Definition
disease of the adrenal gland
Term
aerosol
Definition
particles of drug suspended in air
Term
afebrile
Definition
having no fever
Term
afferent nerves
Definition
carry messages toward the brain and spinal cord (sensory nerves)
Term
agoraphobia
Definition
fear of open spaces
Term
akinetic
Definition
pertaining absence of voluntary movement
Term
albinism
Definition
inherited absence of pigment in the skin, hair, and eyes
Term
albino
Definition
individual lacking normal body pigment (melanin)
Term
albumin
Definition
protein found in blood that maintains the proper amount of water in blood
Term
albuminuria
Definition
protein in the urine
Term
aldosterone (mineralocorticoid)
Definition
secreted by the adrenal cortex; increases sodium reabsorption by kidney tubules
Term
alkylating agents
Definition
synthetic chemicals containing alkyl groups that interfere with DNA synthesis used in cancer chemotherapy
Term
allergen
Definition
substance capable of causing a specific hypersensitivity in a body; an antigen
Term
allergy
Definition
abnormal hypersensitivity acquired by exposure to an antigen (allergen)
Term
alopecia
Definition
baldness, loss of hair
Term
alopecia areata
Definition
an idiopathic condition in which hair falls out in patches
Term
alveolar
Definition
pertaining to a small sac or alveolus
Term
alveolus (pl. alveoli)
Definition
an individualized section of an air sac in the lung
Term
ambylopia
Definition
reduced vision (poor eyesight)
Term
amenorrhea
Definition
absence of menstrual flow
Term
amino acids
Definition
building blocks of proteins, produced when proteins are digested
Term
amniocentesis
Definition
surgical puncture to remove fluid from the amnion sac surrounding embryo and fetus
Term
amnion
Definition
innermost membranous sac surrounding the developing fetus
Term
amniotic fluid
Definition
fluid contained within the amniotic sac surrounding the fetus
Term
amphetamine
Definition
central nervous system stimulant
Term
amylase
Definition
enzyme secreted by the pancreas to digest starch
Term
amyloid
Definition
a waxy translucent complex protein resembling starch that results from degeneration of tissue
Term
amyotrophic lateral sclerosis (ALS)
Definition
degenerative disorder of motor neurons in the lateral columns of the spinal cord and brainstem. Also known as Lou Gehrig disease.
Term
anabolism
Definition
process of building up or synthesizing substances (such as proteins) in a cell
Term
anal fistula
Definition
abnormal tube-like passageway near the anus
Term
analgesia
Definition
absence of sensitivity to pain
Term
analgesic drugs
Definition
drugs that selectively suppress pain without producing sedation
Term
analysis
Definition
separation of a substance into various parts
Term
anaphylaxis
Definition
exaggerated hypersensitivity reaction to a previously encountered drug or to a foreign protein (antigen)
Term
anaplasia
Definition
loss of differentiation of cells; reversion to a more primitive cell type
Term
anaplastic
Definition
lack of orderly arrangement; variation in size and shape
Term
anastomosis
Definition
surgical procedure that creates a new opening between two previously unconnected tubular organs or parts of the same organ
Term
androgen
Definition
male hormone secreted by the testes, responsible for developing and maintaining male secondary sex characteristics. Testosterone is an example.
Term
anemia
Definition
decrease in hemoglobin in the blood caused by deficiency of red blood cells
Term
anencephaly
Definition
congenital condition of partial or complete absence of brain matter
Term
anesthesia
Definition
absence of nervous feeling or sensation
Term
anesthetic
Definition
drug that reduces or eliminates nervous sensation
Term
aneurysm
Definition
enlarged, weakened area in an arterial wall, which may rupture, leading to hemorrhage and CVA (stroke)
Term
angina (pectoris)
Definition
chest pain associated with myocardial ischemia
Term
angiogenesis
Definition

process of forming new blood vessels

 

 

Term
angiogram
Definition
x-ray image of blood vessels after injecting contrast material into the vessels
Term
angiography
Definition
x-ray imaging of blood vessels after injection of contrast material
Term
angioplasty
Definition
surgical repair of a blood vessel by inserting a catheter and balloon to enlarge opening
Term
angiotensin II receptor antagonist
Definition
drug that lowers blood pressure by preventing angiotensin from acting on receptors in blood vessels
Term
anhidrosis
Definition
absence of sweating
Term
anisocoria
Definition
inequality in the size of the pupils
Term
anisocytosis
Definition
inequality in the size of red blood cells
Term
ankylosing spondylitis
Definition
chronic inflammatory joint disease involving the backbones; marked by stiffness and eventual fusion of involved joints
Term
ankylosis
Definition
abnormal condition of stiffening and immobility (fusion) of a joint due to disease, injury, or surgical procedure
Term
anorchism
Definition
congenital absence of one or both testes
Term
anorexia
Definition
lack of appetite
Term
anosmia
Definition
loss of the sense of smell
Term
anovulatory
Definition
not accompanied by ovulation (release of eggs from the ovary)
Term
anoxia
Definition
lack of oxygen in body tissues
Term
antacid
Definition
drug that works against acid in the stomach
Term
antagonistic action
Definition
combination of two drugs gives less than the sum of the effects of each together
Term
ante cibum
Definition
before meals (a.c.)
Term
anteflexion
Definition
bending forward
Term
antepartum
Definition
before birth
Term
anterior
Definition
pertaining to the front (ventral) side of a structure
Term
anterior chamber
Definition
space behind the cornea and in front of the lens and iris; contains aqueous humor
Term
anteroposterior
Definition
in this AP x-ray view, x-rays travel from an anteriorly placed source to a posteriorly placed detector (x-ray beam passes from the front to the back of the body)
Term
anthracosis
Definition
abnormal condition of coal dust in the lungs; black lung disease
Term
anti-Alzheimer
Definition
drug used to treat symptoms of Alzheimer disease (Aricept)
Term
antiandrogen
Definition
drug that slows the uptake of androgens or interferes with their effect in tissues
Term
antianginal
Definition
drug that prevents chest pain due to ischemia
Term
antiarrhythmic
Definition
drug that treats abnormal heart rhythms
Term
antibiotic drugs
Definition
drugs used to cure infections by killing pathogenic bacteria such as those that cause bacterial meningitis
Term
antibody
Definition
protein made by white blood cells in response to foreign substances (antigens) in the blood
Term
anticholinergic drugs
Definition
drugs that block acetylcholine, used to treat myasthenia gravis, Parkinson disease, and motion sickness
Term
anticoagulant
Definition
substance or drug that prevents blood clotting - example: Coumadin (warfarin)
Term
anticonvulsant
Definition
drug that prevents convulsions and seizures (Dilantin)
Term
anticonvulsant-antiepileptic drugs
Definition
drugs used to suppress seizures by changing the permeability of the neuron cell membrane so that it does not depolarize so readily. Used to treat tonic-clonic and absence seizures.
Term
antidepressant
Definition
drug that relieves symptoms of depression (Prozac)
Term
antidiabetic
Definition
drug given to prevent or treat diabetes mellitus. Type I - receive daily injections of insulin. Type II - non-insulin dependent; oral antidiabetic drugs used
Term
antidiarrheal
Definition
drug that prevents diarrhea
Term
antidiuretic hormone (ADH), vasopressin
Definition
secreted by the posterior lobe of the pituitary gland; promotes water reabsorption by the kidney and decreases production of urine
Term
antidote
Definition
agent given to counteract an unwanted effect of a drug
Term
antiemetic
Definition
drug that prevents nausea and vomiting
Term
antifungal drugs
Definition
drugs used to treat fungal infections. In the respiratory system, oral or intravenous drugs are used to treat lung infections.
Term
antigen
Definition
substance (protein) that stimulates the production of antibodies
Term
antiglobulin test (Coombs test)
Definition
test for the presence of antibodies that coat and damage erythrocytes; determines presence of antibodies in infants of Rh-negative women with autoimmune hemolytic anema; Coombs test
Term
antihistamine
Definition
drug that blocks the action of histamine at the target organ and helps prevent symptoms of allergy (Zyrtec, Benadryl)
Term
antihypertensive
Definition
drug that reduces blood pressure
Term
antimetabolites
Definition
chemicals that prevent cell division by inhibiting formation of substances necessary to make DNA; used in cancer chemotherapy
Term
antimitotics
Definition
drugs that block mitosis (cell division). Taxol is an antimitotic used to treat breast and ovarian cancers.
Term
antinauseant
Definition
drug that relieves nausea and vomiting; antiemetic
Term
antinuclear antibody test
Definition
detects an antibody present in serum of patients with systemic lupus erythematosus
Term
antiosteoporosis
Definition

 

drugs used to prevent bone loss such as bisphosphonates (Fosamax), or Selective Estrogen Receptor Modulators (SERM) that are hormone-like drugs used to increase bone formation (Evista)

 

Term
antiparkinsonian agents
Definition
drugs used in the treatment of Parkinson disease by increasing the amount of dopamine in the brain
Term
antiplatelet
Definition
drug that reduces the tendency of platelets to stick together and form a clot (Plavix)
Term
antipruritic
Definition
drug that acts against itching (pruritus)
Term
antipsychotic drugs
Definition
drugs used to treat agitation in the elderly with dementia and schizophrenia. Also called neuroleptics.
Term
antipyretic
Definition
drug that lowers fever
Term
antisepsis
Definition
destruction of microorganisms to prevent infection
Term
antitoxin
Definition
substance produced against a toxin (poison); an antibody
Term
antitubercular drugs
Definition
drugs that inhibit the spread or progress of tuberculosis in the body
Term
antiulcer
Definition
drug that inhibits the secretion of acid by cells lining the stomach
Term
antiviral
Definition
drug that acts against viruses such as herpes virus and HIV
Term
anuria
Definition
suppression of urine formation by the kidney
Term
anus
Definition
opening of the digestive tract to the outside of the body
Term
aorta
Definition
largest artery in the body
Term
aortic stenosis
Definition
narrowing of the aorta
Term
apex of the lung
Definition
uppermost portion of the lung
Term
aphagia
Definition
inability to swallow
Term
aphakia
Definition
absence of the lens of the eye
Term
aphasia
Definition
motor and sensory language disturbances caused by brain lesions but not those caused by mental defects, disturbances in sense organs or paralysis of muscles needed for speech. There are many types.
Term
apheresis
Definition
withdrawal and separation of blood elements
Term
aphthous stomatitis
Definition
inflammation of the mouth with small, painful ulcers. Commonly called canker sores; its cause is unknown.
Term
apical
Definition
pertaining to the tip of an organ
Term
aplastic anemia
Definition
failure of blood cell production due to aplasia (absence of formation) of bone marrow cells
Term
apnea
Definition
without breathing, stoppage of breathing
Term
apocrine sweat gland
Definition
one of the large dermal exocrine glands located in the axilla and genital areas. It secretes sweat that, in action with bacteria, is responsible for human body odor.
Term
apoptosis
Definition
programmed cell death. Normal cells undergo apoptosis when damaged or aging. Some cancer cells have lost the ability to undergo apoptosis, and they live forever.
Term
appendectomy
Definition
removal or excision of the appendix
Term
appendicitis
Definition
inflammation of the appendix
Term
appendix
Definition
blind pouch hanging from the cecum (RLQ)
Term
apraxia
Definition
inability to carry out purposeful, learned, voluntary actions although there is no paralysis present. Involves association areas of the brain.
Term
aqueous humor
Definition
fluid produced by the ciliary body and found in the anterior chamber of the eye
Term
arachnoid membrane
Definition
middle layer of the three membranes (meninges) that surround the brain and spinal cord
Term
areola
Definition
dark-pigmented area surrounding the breast nipple
Term
aromatase inhibitor
Definition
drug that reduces estrogen in the blood by blocking the enzyme aromatase. Used to starve breast tumors of estrogen supply in postmenopausal women.
Term
arrhythmia
Definition
without rhythm; an irregular beat of the heart
Term
arterial anastomosis
Definition
surgical connection between two arteries
Term
arteriography
Definition
x-ray recording of arteries; contrast is injected
Term
arteriole
Definition
small artery
Term
arteriosclerosis
Definition
hardening of an artery with a collection of fatty mass resulting in the thickening and loss of elasticity of the arterial walls
Term
arterivenous fistula
Definition
communication between an artery and vein is created surgically to provide access for hemodialysis
Term
artery
Definition
largest type of blood vessel
Term
arthralgia
Definition
pain of a joint
Term
arthritis
Definition
inflammation of a joint
Term
arthrocentesis
Definition
surgical puncture to remove fluid from a joint
Term
arthrodesis
Definition
surgical fusion of a joint to eliminate movement
Term
arthrography
Definition
x-ray imaging of a joint after injection of contrast material
Term
arthroplasty
Definition
surgical repair of a joint (with prostheses); total hip replacement and total knee replacement are examples
Term
arthroscopy
Definition
visual examination of the inside of joint with an endoscope
Term
arthrotomy
Definition
incision of a joint
Term
articular cartilage
Definition
thin layer of cartilage surrounding bones in the joint space
Term
articulation
Definition
a connection between bones; joint
Term
asbestosis
Definition
abnormal condition of asbestos fiber particles in the lungs
Term
ascites
Definition
abnormal accumulation of fluid in the abdomen
Term
aspermia
Definition
failure in male sperm cells (spermatozoa) production as well as ejaculation of semen (fluid and sperm cells)
Term
asphyxia
Definition
deficient oxygen and increased carbon dioxide in the bloodstream
Term
aspiration
Definition
drawing in or out as by suction
Term
asthma
Definition
chronic inflammation disorder, characterized by airway obstruction and caused by bronchial edema, bronchoconstriction, and increased mucus production
Term
astigmatism
Definition
abnormal curvature of the eyeball so that rays of light are not focused on a single point on the retina
Term
astrocyte
Definition
a type of glial (neurologic) cell that transports water and salts from capillaries
Term
astrocytoma
Definition
malignant tumor of astrocytes (glial brain cells)
Term
ataxia
Definition
partial or complete inability to coordinate voluntary movements, many different types associated with specific areas of pathology
Term
atelectasis
Definition
collapsed lung
Term
atherectomy
Definition
removal of plaque (lipids and clots) that accumulate in the lining of an artery
Term
atheroma
Definition
mass of fatty plaque that collects in an artery
Term
atherosclerosis
Definition
form of arteriosclerosis in which fatty plaque deposits in the interior lining of an artery
Term
atopic dermatitis
Definition
inflammation of skin (rash and intense itching) that tends to occur in patients with a family history of allergic reactions
Term
atopy
Definition
intense allergic reaction (such as asthma) influenced by hereditary tendency or predisposition
Term
atresia
Definition
absence of a normal opening
Term
atrial
Definition
pertaining to an atrium (upper chamber of the heart)
Term
atrial fibrillation
Definition
electrical impulses move randomly throughout the atria, causing the atria to quiver instead of contracting with a normal rhythm
Term
atrioventricular block
Definition
failure of conduction of impulses from the AV node to the atrioventricular bundle and ventricles of the heart
Term
atrioventricular bundle (bundle of His)
Definition
specialized muscle fibers connecting the atria with the ventricles and transmitting impulses between them; bundle of His
Term
atrioventricular node
Definition
specialized tissue in the wall between the atria. Electrical impulses pass from the sino-atrial node (pacemaker) through the atrioventricular node and atrioventricular bundle (bundle of His) toward the ventricles.
Term
atrium (pl. atria)
Definition
upper chamber of the heart
Term
atrophy
Definition
wasting away (lack of development) of a normally developed organ or tissue (especially muscle)
Term
audiogram
Definition
record of hearing using an audiometer
Term
audiometer
Definition
instrument to measure or test hearing
Term
audiometry
Definition
process of testing hearing
Term
auditory canal
Definition
channel leading from the ear flap to the eardrum
Term
auditory meatus
Definition
opening of the auditory canal to the outside of the body
Term
auditory nerve fibers
Definition
carry impulses from the inner ear to the cerebral cortex
Term
auditory tube
Definition
channel between the middle ear and the throat; eustachian tube
Term
aura
Definition
peculiar sensation experienced by some persons with epilepsy before onset of an actual seizure
Term
aural
Definition
pertaining to the ear
Term
auricle
Definition
flap of the ear; pinna
Term
auscultation
Definition
use of a stethoscope to listen for sounds emanating from the heart or other organs
Term
autoimmune disease
Definition
antibodies that are produced against an individual's own normal cells; chronic disabling disease caused by the abnormal production of antibodies to normal body tissues; multiple sclerosis, lupus erythematosus are examples
Term
autologous transfusion
Definition
removal and then reinfusion of a patient's own blood or blood components
Term
autonomic nervous system
Definition
nerves that control involuntary body functions of muscles, glands, and internal organs
Term
autopsy
Definition
examination of a body after death (postmortem) to determine the cause of death
Term
axillary
Definition
pertaining to under the arm or armpit
Term
axillary node
Definition
lymph node under the arm
Term
axon
Definition
microscopic fiber that carries the nervous impulse along a nerve cell
Term
azoospermia
Definition
lack of live spermatozoa in the semen
Term
azotemia
Definition
excess of nitrogenous waste products in the blood; uremia
Term
bacilli
Definition
rod-shaped bacteria that are the cause of tuberculosis
Term
bactericidal
Definition
pertaining to killing bacteria
Term
bacteriostatic
Definition
pertaining to inhibiting bacterial growth
Term
bacteriuria
Definition
bacteria in the urine
Term
balanitis
Definition
inflammation of the glans penis
Term
barbiturate drugs
Definition
drugs that act by inhibiting conduction of nerve impulses to the cortex of the brain and depressing motor areas of the brain to produce sedation (sleep). Some barbiturates also possess an anticonvulsant action and are used to treat seizures.
Term
basal cell carcinoma
Definition
skin cancer arising from cells in the basal layer of the epidermis
Term
basal layer
Definition
lower layer of cells in the epidermis
Term
base of the lung
Definition
the lower portion of the lung
Term
basophil
Definition
a granular leukocyte with an irregularly shaped nuceus and cytoplasm containing blue granules
Term
benign tumor
Definition
noncancerous growth (neoplasm)
Term
benzodiazepines
Definition
minor tranquilizers to control minor symptoms of anxiety
Term
beta-HCG test
Definition
test for the presence of a portion of human chorionic gonadotropin hormone (a marker for testicular cancer)
Term
beta-blocker
Definition
blocks the action of epinephrine (adrenaline) on the heart and blood vessels. Produces vasodilation which lowers blood pressure.
Term
biconvex
Definition
having two sides that are rounded, elevated, and curved evenly like part of a sphere. The lens of the eye is biconvex
Term
bifurcation
Definition
branching or forking into two parts
Term
bilateral
Definition
pertaining to both or two sides
Term
bilateral oophorectomy
Definition
excision or removal of both ovaries
Term
bile
Definition
digestive juice made in the liver and stored in the gallbladder. It breaks up (emulsifies) large fat globules. It is composed of bile pigments, cholesterol, and bile salts.
Term
biliary
Definition
pertaining to bile or bile ducts. Bile ducts empty bile into the small intestine (duodenum).
Term
biliary atresia
Definition
congenital absence of the opening from the common bile duct into small intestine (duodenum)
Term
bilirubin
Definition
orange-yellow pigment found in bile. It is released from the breakdown of hemoglobin when red blood cells die
Term
biological response modifier
Definition
substances produced by normal cells that either directly block tumor growth or stimulate the immune system to fight cancer
Term
biological therapy
Definition
use of the body's own defenses to destroy tumor cells
Term
biology
Definition
process of study of life (living organisms)
Term
biopsy
Definition
process of removing a small piece of living tissue for microscopic examination
Term
bisphosphonate
Definition
drug that prevents bone loss in osteoporosis and osteopenia
Term
biventricular pacemaker
Definition
device enabling ventricles to beat together (in synchrony) so that more blood is pumped out of the heart
Term
bladder cancer
Definition
malignant tumor of the urinary bladder
Term
blast
Definition
refers to an immature cell (as in glioblastoma)
Term
bleeding time
Definition
time required for blood to stop flowing from a tiny puncture wound
Term
blepharitis
Definition
inflammation of an eyelid
Term
blepharoptosis
Definition
prolapse of the upper eyelid; ptosis
Term
blood transfusion
Definition
blood cells or whole blood from a closely-matched donor are infused into a patient
Term
blood urea nitrogen (BUN)
Definition
measurement of urea levels in blood
Term
blood-brain barrier
Definition
blood vessels (capillaries) that selectively let certain substances enter the brain tissue and keep other substances out
Term
bolus
Definition
mass of food
Term
bone density test
Definition
low energy x-rays are taken of bones in the spinal column, pelvis, and wrist to determine bone density; also called dual-energy x-ray absorptiometry (DEXA or DXA)
Term
bone marrow biopsy
Definition
needle aspiration of a small amount of bone marrow followed by examination under a microscope
Term
bone marrow transplant
Definition
bone marrow tissue is infused intravenously into a patient
Term
bone scan
Definition
a radioactive (technetium-99m) phosphate compound is injected intravenously and bones are scanned for evidence of tumors
Term
borborygmus
Definition
rumbling or gurgling noise produced by the movement of gas, fluid, or both in the gastrointestinal tract. Plural form is borborygmi
Term
bowel
Definition
intestine
Term
brachial artery
Definition
artery that carries blood to the arm
Term
brachytherapy
Definition
placement of radioactive material (small sealed containers) in contact with or implanted into tumor tissue
Term
bradycardia
Definition
slow heart beat, usually less than 60 beats per minute
Term
bradykinesia
Definition
abnormal slowness of physical movement, especially as an effect of Parkinson disease
Term
brain tumor
Definition
abnormal growth of brain tissue and meninges
Term
brainstem
Definition
lower portion of the brain that connects the cerebrum with the spinal cord. The pons and medulla oblongata are part of the brainstem.
Term
brand name
Definition
commercial name for a drug; trade or trademark name
Term
bronchial alveolar lavage
Definition
irrigation or washing of a bronchus by injecting fluid through a bronchoscope and then removing it to analyze the contents
Term
bronchiectasis
Definition
abnormal widening of the bronchial tubes or their branches
Term
bronchiole
Definition
small bronchial tube
Term
bronchiolitis
Definition
inflammation of a bronchiole
Term
bronchitis
Definition
inflammation of bronchial tubes
Term
bronchodilator
Definition
drug that dilates (widens) bronchial tubes and relieves bronchospasm; by relaxing the smooth muscle of the bronchi, thereby increasing airflow. Used to treat asthma, emphysema, COPD, and exercise-induced bronchospasm.
Term
bronchogenic
Definition
pertaining to originating in the bronchial tubes
Term
bronchopleural
Definition
pertaining to a bronchial tube and pleura
Term
bronchopleural fistula
Definition
abnormal connection between the bronchial tube and the pleural cavity, causing air to leak into the pleural space
Term
bronchoscopy
Definition
visual examination of the bronchial tubes using an endoscope or bronchoscope
Term
bronchospasm
Definition
sudden involuntary contraction of the muscles in the walls of the bronchial tubes; occurs in asthma
Term
bronchus (pl. bronchi)
Definition
branch of the trachea that leads towards the air sacs of the lung
Term
bruit
Definition
an abnormal blowing or swishing sound heard on auscultation of an artery or an organ
Term
buccal
Definition
pertaining to the cheek
Term
buccal mucosa
Definition
mucous membrane lining the cheek
Term
bulbourethral gland (Cowper gland)
Definition
one of a pair of exocrine glands near the male urethra
Term
bulla (pl. bullae)
Definition
large blister
Term
bundle of His
Definition
atrioventricular bundle
Term
bunion
Definition
abnormal swelling of the joint between the big toe and a bone of the foot
Term
bursa (pl. bursae)
Definition
sac of fluid between tendons and bones near a joint
Term
bursitis
Definition
inflammation of a bursa surrounding a joint
Term
cachexia (adj. cachectic)
Definition
general ill health (muscle wasting and weight loss) associated with severe, chronic disease, such as cancer
Term
caffeine
Definition
central nervous system stimulant
Term
calcaneal
Definition
pertaining to the calcaneus (heel bone)
Term
calcaneus
Definition
heel bone
Term
calcitonin
Definition
secreted by the thyroid gland; decreases blood calcium levels
Term
calcium
Definition
one of the mineral constituents of bone; necessary for proper bone development
Term
calcium channel blocker
Definition
drug that stops entrance of calcium into muscle of the heart and blood vessels. This lowers blood pressure and restores normal heart rhythm.
Term
caliceal
Definition
pertaining to a calyx (cup-shapped collecting chamber in the central portion of the kidney)
Term
caliectasis
Definition
dilation or widening of a calyx. This occurs when urine is backed up in the kidney as in hydronephrosis.
Term
callus
Definition
hard, thickened area of skin occurring in areas of the body exposed to friction or pressure
Term
calyx or calix (pl. calyces or calices)
Definition
cup-like collecting region of the renal pelvis
Term
cancellous bone
Definition
spongy, porous bone tissue in the inner part of a bone
Term
cancer treatment modalities
Definition
surgery, radiation therapy, chemotherapy, biological therapy
Term
canine teeth
Definition
pointed, "dog tooth"-like teeth, next to (distal to) the incisors. Also called cuspids or eyeteeth.
Term
cannulation
Definition
introduction of a tube (cannula) through a passageway
Term
capillary
Definition
smallest blood vessel
Term
carbon dioxide
Definition
gas released by body cells and carried by veins to the heart, and then to the lungs for exhalation; CO2
Term
carcinogenesis
Definition
formation or production of cancer
Term
carcinogenic
Definition
pertaining to producing cancer
Term
carcinogens
Definition
agents that cause cancer; chemicals and drugs, radiation, and viruses
Term
carcinoma
Definition
cancerous or malignant tumor made up of cells of epithelial origin
Term
carcinoma in situ
Definition
localized cancer, confined to its site of origin
Term
carcinoma of the breast
Definition
malignant tumor of the breast (arising from milk glands and ducts)
Term
carcinoma of the cervix
Definition
malignant cells within the cervix (cervical cancer)
Term
carcinoma of the endometrium (endometrial cancer)
Definition
malignant tumor of the uterus (adenocarcinoma)
Term
carcinoma of the prostate (prostate cancer)
Definition
malignant tumor of the prostate gland
Term
carcinoma of the testes (testicular cancer)
Definition
malignant tumor of the testicles
Term
cardiac
Definition
pertaining to the heart
Term
cardiac MRI
Definition
images of the heart are produced with magnetic waves
Term
cardiac arrest
Definition
sudden, unexpected stoppage of the heart; sudden cardiac death
Term
cardiac catheterization
Definition
thin, flexible tube is guided into the heart via a vein or an artery and after contrast material is introduced, blood pressure is measured, and x-rays taken to image patterns of blood flow
Term
cardiac echocardiography
Definition
high-energy sound waves are transmitted into the chest and images recorded of valves, chambers, surfaces, and movement of the heart
Term
cardiac electron beam computed tomography
Definition
electron beams and CT identify calcium deposits in and around coronary arteries to diagnose early coronary artery disease
Term
cardiac tamponade
Definition
pressure on the heart caused by fluid in the pericardial space
Term
cardiology
Definition
process of study of the heart
Term
cardiomegaly
Definition
enlargement of the heart
Term
cardiomyopathy
Definition
disease of heart muscle
Term
cardiomyopathy
Definition
disease of heart muscle
Term
cardiovascular drug
Definition
drugs that act on the heart or the blood vessels to treat hypertension, angina, myocardial infarction, congestive heart failure and arrhythmias. Examples: ACE inhibitors, diuretics, beta-blockers, statins
Term
cardioversion (defibrillation)
Definition
treatment for serious arrhythmias using brief discharges of electricity to shock the heart so that a normal rhythm can begin
Term
carpal tunnel syndrome (CTS)
Definition
compression (by a wrist ligament) of the median nerve as it passes between the ligament and bones and tendons of the wrist
Term
carpals
Definition
bones of the wrist
Term
cartilage
Definition
elastic, connective tissue found at joints, within the trachea and larynx, and connected to ribs, nose, and ear.
Term
cast
Definition
mold of the bone applied to fractures to immobilize the injured bone
Term
castration
Definition
surgical excision of testicles or ovaries
Term
catabolism
Definition
cellular process of breaking down or a complex substance into simple compounds. Energy is released to do the work of the cell.
Term
cataract
Definition
clouding or loss of transparency of the lens of the eye
Term
catecholamines
Definition
hormones derived from an amino acid and secreted by the adrenal medulla. Epinephrine is an example.
Term
cathartic
Definition
drug that relieves constipation
Term
catheter
Definition
thin, flexible tube used in a variety of ways
Term
cauda equina
Definition
collection of spinal nerves below the end of the spinal cord
Term
caudal
Definition
pertaining to the lower portion of an organ or structure
Term
causalgia
Definition
intense burning pain, often resulting from injury to a peripheral nerve
Term
cauterization
Definition
burning of tissue to destroy it with a caustic, an electrical current, a hot iron, or by freezing
Term
cecal
Definition
pertaining to the cecum, which is the first part of the large intestine (colon)
Term
cecal volvulus
Definition
abnormal twisting of the cecum (first part of the colon)
Term
cecum
Definition
first part of the large intestine
Term
celiac
Definition
pertaining to the abdomen
Term
celiac disease
Definition
inherited autoimmune disorder in which the lining of the small intestine (villi) is damaged from eating gluten found in wheat, barley, and rye.
Term
cell body
Definition
part of a nerve cell that contains the nucleus
Term
cell membrane
Definition
thin and delicate structure surrounding a cell; allows materials to pass in and out
Term
cell-mediated immunity
Definition
type of immune response that involves T cell lymphocytes. These lymphocytes act directly on antigens to destroy them.
Term
cellular oncogenes
Definition
pieces of DNA that, when broken or dislocated, can cause a normal cell to become malignant
Term
cellulitis
Definition
diffuse, acute inflammatory infection of the skin marked by local heat, redness, pain and swelling
Term
central nervous system (CNS)
Definition
brain and the spinal cord
Term
cephalgia
Definition
head pain; headache
Term
cephalic
Definition
pertaining to the head
Term
cephalic version
Definition
procedure for turning the fetus so that its head is the presenting part to enter the birth canal first
Term
cerebellar
Definition
pertaining to the cerebellum
Term
cerebellopontine
Definition
pertaining to the cerebellum and pons
Term
cerebellum
Definition
posterior part of the brain that coordinates muscle movements and maintains balance
Term
cerebral
Definition
pertaining to the cerebrum
Term
cerebral angiography
Definition
x-ray imaging of the arterial blood vessel system in the brain after injection of contrast material
Term
cerebral concussion
Definition
temporary brain dysfunction (brief loss of consciousness) after injury, usually clearing within 24 hours
Term
cerebral contusion
Definition
bruising of brain tissue as a result of direct trauma to the head; neurologic deficits persist longer than 24 hours
Term
cerebral cortex
Definition
outer region of the cerebrum; containing sheets of nerve cells; gray matter of the brain
Term
cerebral edema
Definition
swelling of the brain due to the uptake of water in the neuropile and white matter
Term
cerebral hemorrhage
Definition
bursting of an artery in the brain
Term
cerebral infarction
Definition
a condition in which a localized area of cerebral tissue is dying or dead owing to insufficient supply of blood
Term
cerebral palsy
Definition
partial paralysis and muscular coordination caused by loss of oxygen or blood flow to the cerebrum during pregnancy or in the perinatal period
Term
cerebrospinal fluid (CSF)
Definition
fluid that circulates throughout the brain and spinal cord
Term
cerebrospinal fluid analysis
Definition
samples of CSF are examined
Term
cerebrovascular accident (CVA)
Definition
disruption in the normal blood supply to the brain; stroke
Term
cerebrum
Definition
largest part of the brain; responsible for voluntary muscular activity, vision, speech, taste, hearing, thought, and memory
Term
cerumen
Definition
waxy substance secreted by the ear; ear wax
Term
cervical
Definition
pertaining to the neck of the body or neck of the uterus (cervix)
Term
cervical dysplasia
Definition
abnormal cells in the cervix (lower, neck-like region of the uterus)
Term
cervical node
Definition
lymph node in the neck
Term
cervical vertebrae
Definition
seven backbones in the neck (C1-C7)
Term
cervicitis
Definition
inflammation of the cervix
Term
cervix
Definition
lower, neck-like portion of the uterus
Term
cesarean section
Definition
surgical incision of the abdominal wall and uterus to deliver a fetus
Term
chalazion
Definition
small, hard mass (granuloma) on the eyelid
Term
chancre
Definition
primary lesion of syphilis; a hard ulcer occurring at the site of entry of the bacterial infection and most frequently on the external genitalia
Term
cheilitis
Definition
inflammation of the lip
Term
cheilosis
Definition
abnormal condition of the lips
Term
chemical name
Definition
chemical formula for a drug
Term
chemotherapy
Definition
treatment with drugs
Term
chest tomograms
Definition
series of x-ray images that reveal the chest in-depth (layers or sections of the lung)
Term
chlamydial infection
Definition
bacterial infection causing pelvic inflammation in the reproductive tract of women and men
Term
cholangiectasis
Definition
abnormal widening or dilation of a bile vessel (bile duct)
Term
cholangiography
Definition
process of x-ray imaging bile ducts after injecting contrast into the bile ducts
Term
cholangiopancreatography
Definition
x-ray recording of bile vessels (ducts) and the pancreas after administration of contrast material directly into the bile and pancreatic ducts
Term
cholecystectomy
Definition
excision or removal of the gallbladder
Term
cholecystojejunostomy
Definition
surgical anastomosis between the gallbladder and the jejunum
Term
cholecystolithiasis
Definition
abnormal condition of stones in the gallbladder
Term
choledochal
Definition
pertaining to the common bile duct
Term
choledochojejunostomy
Definition
surgical anastomosis (create a new opening) between the common bile duct and the jejunum
Term
choledocholithiatis
Definition
abnormal condition of stones in the common bile duct
Term
choledochotomy
Definition
incision of the common bile duct
Term
cholelithiasis
Definition
abnormal condition of forming gallstones
Term
cholestasis
Definition
stoppage of bile flow
Term
cholesteatoma
Definition
middle ear mass of cellular debris and cholesterol crystals
Term
chondrocostal
Definition
pertaining to cartilage that is attached to the ribs
Term
chondroma
Definition
benign tumor of cartilage
Term
chondromalacia
Definition
softening of cartilage
Term
chondrosarcoma
Definition
malignant tumor of cartilage
Term
choreic
Definition
dance-like movements consisting of uncontrollable, irregular, jerking movements of the arms and legs and facial grimacing as seen in Huntington disease
Term
choriocarcinoma
Definition
malignant tumor of the placenta
Term
choriogenesis
Definition
formation of the chorion, the outermost membrane surrounding the fetus
Term
chorion
Definition
outermost layer of the two membranes surrounding the embryo; it forms the fetal part of the placenta
Term
chorionic
Definition
pertaining to the chorion
Term
chorionic villus sampling (CVS)
Definition
sampling of placental tissues (chorionic villi) for prenatal diagnosis
Term
choroid
Definition
middle, vascular layer of the eye
Term
chromosome
Definition
threadlike structure within the nucleus of a cell; contains genetic material (DNA)
Term
chronic
Definition
condition with little change or slow progression over a long period of time
Term
chronic bronchitis
Definition
inflammation of the bronchi persisting over a long period of time
Term
chronic lymphocytic leukemia
Definition
malignant, but relatively mature lymphocytes, multiply in bone marrow, lymph nodes, and spleen
Term
chronic obstructive pulmonary disease (COPD)
Definition
lung and bronchial tube conditions that block and damage airways and persist over a long period of time. Chronic bronchitis, asthma, and emphysema are all components of COPD.
Term
cicatrix
Definition
scar tissue
Term
cilia
Definition
thin hairs that line the nasal passageways and tubes of the respiratory tract
Term
ciliary body
Definition
structure on each side of the lens that connects the choroid and iris; contains muscles that control the shape of the lens
Term
cineradiography
Definition
use of motion picture techniques to record a series of x-ray images during fluoroscopy
Term
circumcision
Definition
surgical procedure to remove the prepuce of the penis
Term
cirrhosis
Definition
chronic degenerative disease of the liver
Term
claudication
Definition
pain, tension, and weakness in a leg after walking has begun, but absence of pain at rest
Term
clavicle
Definition
collar bone
Term
clitoris
Definition
organ of sensitive erectile tissue anterior to the opening of the female urethra
Term
clonus
Definition
rapidly alternating involuntary contraction and relaxation of a muscle in response to a sudden stretch. Pathological reflex.
Term
closed fracture
Definition
break in the bone without an open skin wound
Term
closed reduction
Definition
bone is put in proper place without incision of skin
Term
coagulation
Definition
process of blood clotting
Term
coagulation time
Definition
time required for venous blood to clot in a test tube
Term
coagulopathy
Definition
disease of blood clotting
Term
coarctation of the aorta (CoA)
Definition
congenital anomaly in which a portion of the aorta near the heart is narrowed or stenosed
Term
coccygeal
Definition
pertaining to the tailbone or coccyx
Term
coccyx
Definition
tailbone at the end of the spinal or vertebral column
Term
cochlea
Definition
snail-shaped, spirally wound tube in the inner ear; contains hearing-sensitive receptor cells
Term
cochlear
Definition
pertaining to the cochlea
Term
coitus
Definition
sexual intercourse; copulation. Pronunciation is KO-i-tus.
Term
colectomy
Definition
surgical removal (excision) of the colon (large intestine)
Term
colic
Definition
intermittent spasms of pain caused by inflammation and distention of a hollow organ
Term
collagen
Definition
protein found in skin; dense connective tissue strands of protein found in bone
Term
colon
Definition
large intestine, consisting of the cecum; the ascending, transverse, and descending segments of the colon; and the rectum
Term
colonic
Definition
pertaining to the colon
Term
colonic polyposis
Definition
polyps (benign growths) protrude from the mucous membrane of the colon. Polyps can be pedunculate (attached at the membrane by a stalk) or sessile (sitting directly on the mucous membrane).
Term
colonoscopy
Definition
visual endoscopic examination of the colon
Term
colony-stimulating factor
Definition
protein that stimulates the growth and proliferation of white blood cells (granulocytes)
Term
colorectal cancer
Definition
adenocarcinoma of the colon or rectum, or both
Term
colostomy
Definition
new opening of the colon through the abdominal wall to the outside of the body
Term
colposcopy
Definition
visual examination of the vagina and cervix using a colposcope
Term
coma
Definition
state of unconsciousness from which a patient cannot be aroused
Term
comatose
Definition
pertaining to a coma
Term
combination chemotherapy
Definition
use of several chemotherapeutic agents together for the treatment of tumors
Term
comedo (pl. comedones)
Definition
blackhead
Term
comminuted fracture
Definition
broken bone that is splintered or crushed
Term
commissurotomy
Definition
surgical incision of any commissure (e.g., leaflets of heart valves)
Term
common bile duct
Definition
carries bile from the liver and gallbladder to the duodenum. Also called the choledochus.
Term
compact bone
Definition
hard, dense bone tissue
Term
complete blood count
Definition
determination of the number of red and white blood cells, platelets, hemoglobin, hemacrit, and red cell indices (MCH, MCV, MCHC) in a sample of blood
Term
compound (open) fracture
Definition
break in the bone with wound in the skin
Term
compression fracture
Definition
bone is broken by pressure from another bone; often in vertebrae, bone is partially flattened
Term
computed tomography (CT)
Definition
imaging technique in which a series of x-ray films are obtained to visualize internal organs in multiple views including in cross section
Term
computed tomography of the chest
Definition
computer generated x-ray images showing thoracic structures in cross-section
Term
computerized tomography angiography
Definition
x-ray images are combined with computerized tomography to produce a three-dimensional picture of the heart and blood vessels
Term
condyle
Definition
knuckle-like process at the end of a bone near the joint
Term
cone
Definition
photoreceptor cell in the retina; responsible for color and central vision
Term
congenital anomaly
Definition
abnormality present at birth; birth defect
Term
congenital heart disease
Definition
structural heart defects that appear at birth
Term
congestive heart failure (CHF)
Definition
heart is unable to pump its required amount of blood
Term
conization
Definition
removal of a cone-shaped section (cone biopsy) of the cervix
Term
conjugate deviation
Definition
deviation of both eyes to the same side
Term
conjunctiva
Definition
delicate membrane lining the eyelids and covering the eyeball
Term
conjunctivitis
Definition
inflammation of the conjunctiva; pinkeye
Term
connective tissue
Definition
tissue that supports and binds other tissues and parts. Examples are bone, cartilage, muscle or fibrous tissues.
Term
constipation
Definition
difficulty in passing stools (feces)
Term
contraindication
Definition
a factor that prohibits the administration of a drug or procedure in the care of a patient
Term
contralateral
Definition
affecting the opposite side of a part of the body
Term
contrast studies
Definition
materials (contrast media) are injected to obtain contrast with surrounding tissue when shown on the x-ray film
Term
controlled substances
Definition
drugs that produce tolerance and dependence and have potential for abuse or addiction; drugs regulated under existing federal law
Term
cor pulmonale
Definition
enlargement of the right side of the heart due to lung disease
Term
cornea
Definition
fibrous transparent layer of clear tissue that extends over the anterior portion of the eyeball
Term
corneal abrasion
Definition
rubbing off of a part of the outer layer of the cornea
Term
corneoscleral
Definition
pertaining to the cornea and sclera, which is the white of the eye
Term
coronary arteries
Definition
branches of the aorta bringing oxygen-rich blood to the heart muscle
Term
coronary artery bypass grafting (CABG)
Definition
arteries or veins are grafted onto coronary arteries to bypass blocked arteries and bring needed blood supply to the myocardium
Term
coronary artery disease (CAD)
Definition
arteries that supply blood to the heart muscle become clogged and blocked with deposits of fatty material and cholesterol (plaque)
Term
corpus luteum
Definition
empty ovarian follicle that secretes progesterone after release of the egg cell; literally means yellow (luteum) body (corpus).
Term
cortex
Definition
outer region (bark) of the kidney
Term
cortical
Definition
pertaining to the cortex
Term
corticosteroid
Definition
hormone secreted by the adrenal cortex; cortisol, aldosterone, androgens and estrogens are examples
Term
corticosteroid drugs
Definition
hormonal agents that reduce tissue edema and inflammation associated with chronic lung disease
Term
cortisol (glucocorticoid)
Definition
secreted by the adrenal cortex; increases blood sugar. It is secreted in times of stress and has an anti-inflammatory effect.
Term
cranial bones
Definition
bones of the skull; ethmoid, frontal, occipital, parietal, sphenoid, and temporal bones
Term
cranial cavity
Definition
pertaining to the space within the skull containing the brain and pituitary gland
Term
cranial nerves
Definition
twelve pairs of nerves that carry messages to and from the brain
Term
craniotome
Definition
instrument to cut the skull (cranium)
Term
craniotomy
Definition
process of cutting into the skull; incision of the skull
Term
creatinine
Definition
waste product of muscle metabolism; nitrogenous waste excreted in urine
Term
creatinine clearance
Definition
measure of the efficiency of the kidneys in removing creatinine from the blood
Term
crepitus
Definition
crackling sound produced when ends of broken bone rub against each other or against roughened cartilage
Term
cretinism
Definition
extreme hypothyroidism during infancy and childhood leads to a lack of normal physical and mental growth
Term
croup
Definition
acute viral infection in infants and children; characterized by barking cough, obstruction of the larynx and stridor (strained, high-pitched noisy breathing)
Term
crust
Definition
collection on the skin of dried sebum and cellular debris; scab
Term
cryosurgery
Definition
use of subfreezing temperature to destroy tissue
Term
cryptorchism; cryptorchidism
Definition
undescended testicles
Term
cul-de-sac
Definition
region in the lower abdomen, midway between the rectum and the uterus
Term
culdocentesis
Definition
needle aspiration of fluid from the cul-de-sac
Term
curettage
Definition
scraping of material from the skin or from the wall of a cavity, using a sharp instrument called a curet
Term
cuticle
Definition
small band of skin at the base of a nail
Term
cyanosis
Definition
abnormal condition of blueness of the skin; caused by decreased oxygen and increased carbon dioxide in the blood
Term
cycloplegia
Definition
paralysis of the muscles of the ciliary body
Term
cyst
Definition
thick-walled, closed sac or pouch containing fluid or semisolid material
Term
cystadenocarcinoma
Definition
malignant tumor containing fluid-filled sacs and glandular tissue; commonly occurring in the ovaries
Term
cystectomy
Definition
excision of the urinary bladder
Term
cystic fibrosis
Definition
inherited disorder of exocrine glands resulting in mucous secretions that do not drain normally
Term
cystic tumor
Definition
a cystic tumor forms large open spaces filled with fluid
Term
cystitis
Definition
inflammation of the urinary bladder
Term
cystocele
Definition
hernia of the urinary bladder
Term
cystopexy
Definition
fixation of the bladder
Term
cystoscopy
Definition
direct visual examination of urinary bladder with an endoscope (cystoscope)
Term
cystostomy
Definition
new opening of the urinary bladder to the outside of the body
Term
cytokine
Definition
protein that aids cells to destroy antigens. Examples are interleukins and interferons.
Term
cytology
Definition
process of study of cells
Term
cytoplasm
Definition
all of the substance of a cell other than the nucleus
Term
cytotoxic T cell
Definition
T cell lymphocyte that directly kills foreign cells; T8 cell
Term
dacryoadenitis
Definition
inflammation of tear glands
Term
deafness
Definition
loss of the ability to hear
Term
debridement
Definition
removal of foreign material and dead or damaged tissue
Term
decalcification
Definition
loss or removal of calcium from bones or teeth
Term
decubitus ulcer
Definition
inflammation, sore, or ulcer in the skin over a bony part of the body; pressure ulcer; bedsore
Term
decussate
Definition
"cross over"; nerves decussate in the medulla oblongata so each brain hemisphere controls the contralateral side of the body. (From Latin decussis - the number ten, numeral X.)
Term
dedifferentiation
Definition
loss of differentiation of cells; reversion to a more primitive, embryonic cell type; anaplasia or undifferentiation.
Term
deep
Definition
away from the surface of the body or an organ
Term
deep-vein thrombosis (DVT)
Definition
blood clots form in a large vein, usually in the leg
Term
defecation
Definition
elimination of feces from the digestive tract through the rectum
Term
deglutition
Definition
swallowing
Term
dehydration
Definition
excessive loss of water
Term
dementia
Definition
mental decline and deterioration
Term
demyelination
Definition
destruction of myelin on axons of nerves (as in multiple sclerosis)
Term
dendrite
Definition
microscopic branching fiber of a nerve cell that is the first part to receive the nervous impulse
Term
dendritic cell
Definition
a type of macrophage that captures antigens and presents them to T cells for destruction
Term
dental caries
Definition
tooth decay (caries means decay)
Term
dentalgia
Definition
pain in a tooth
Term
dentibuccal
Definition
pertaining to the cheek and teeth
Term
dentin
Definition
major tissue composing teeth, covered by the enamel in the crown and a protective layer of cementum in the root
Term
deoxygenated blood
Definition
blood that is oxygen-poor
Term
deoxyribonucleic acid (DNA)
Definition
genetic material within the nucleus of a cell; controls cell division and protein synthesis
Term
dependent drainage
Definition
catheterization term: urine flows into a collecting bag
Term
dermabrasion
Definition
treatment for removal of superficial scars or wrinkles on the skin using sandpaper-like material
Term
dermatitis
Definition
inflammation of the skin
Term
dermatologist
Definition
specialist in the study (diagnosis and treatment) of skin disorders
Term
dermatology
Definition
process of study of the skin
Term
dermatome
Definition
an area of skin innervated by sensory fibers from a single spinal or cranial nerve
Term
dermatophytosis
Definition
fungal infection of the skin
Term
dermatoplasty
Definition
surgical repair of the skin
Term
dermis
Definition
middle layer of the skin
Term
dermoid cyst
Definition
ovarian cysts lined with a variety of cell types (hair, skin, teeth)
Term
diabetes insipidus
Definition
inadequate secretion or resistance of the kidney to the action of antidiuretic hormone (ADH, vasopressin) produced by the posterior lobe of the pituitary gland; signs are polyuria and polydispis
Term
diabetes mellitus
Definition
lack of insulin secretion (Type 1) or improper utilization of insulin by cells (Type 2) leading to a chronic disorder of carbohydrate, fat, and protein metabolism in cells
Term
diabetic retinopathy
Definition
disease of the retina due to long-term effects of diabetes
Term
diagnosis
Definition
complete knowledge of a patient's condition
Term
dialysis
Definition
separation of nitrogenous wastes from the blood when the kidneys no longer function
Term
diameter
Definition
measurement between opposite points on the periphery of a circular body part (for example, blood vessel or intestine)
Term
diaphoresis
Definition
profuse sweating
Term
diaphragm
Definition
muscle that separates the chest and abdomen; aids breathing
Term
diaphragmatic excursion
Definition
process of the diaphragm moving from full exhalation to full inhalation
Term
diaphysis
Definition
shaft or mid-portion of a long bone
Term
diarrhea
Definition
frequent passage of loose, watery stools
Term
diastole
Definition
relaxation phase of the heartbeat
Term
differentiating agents
Definition
drugs that promote tumor cells to differentiate, stop growing, and die
Term
differentiation
Definition
specialization of cells; unspecialized cells are modified and altered to form specific and characteristic types and functions; specialization of cells from immature to mature forms
Term
digestion
Definition
breakdown of complex foods to simpler forms
Term
digital rectal examination (DRE)
Definition
finger palpation through the anal canal and rectum to examine the prostate gland
Term
digital subtraction angiography
Definition
video equipment, computer and x-ray machine produce images of blood vessels before and after injecting contrast material
Term
digoxin
Definition
drug that strengthens the force and efficiency of the heartbeat. Used for congestive heart failure.
Term
dilation (dilatation) and curettage (D&C)
Definition
widening of the cervix and scraping the endometrium of the uterus
Term
dilation, dilatation
Definition
expansion of an orifice (opening); widening and enlargement of a hollow organ
Term
diphtheria
Definition
acute infection of the throat caused by diphtheria bacteria; characterized by formation of a thick membrane that obstructs the throat and breathing
Term
diplopia
Definition
double vision
Term
disk (disc)
Definition
circular platelike structure composed of cartilage between vertebrae
Term
diskography
Definition
x-ray images of cervical or lumbar intervertebral disks after injection of contrast material into the interior of the disk
Term
dislocation
Definition
displacement of a bone from its joint
Term
dissection
Definition
the cutting of parts for purpose of separtion and studying of same
Term
distal
Definition
pertaining to far from the beginning of a structure
Term
diuresis
Definition
increased excretion of urine by the kidneys
Term
diuretic
Definition
an agent that increases diuresis (increased excretion of urine by the kidneys), such as tea, coffee, water or certain drugs
Term
diverticula
Definition
small, pouch-like herniations through the muscular wall of a tubular organ such as the colon. Singular form is diverticulum.
Term
diverticulitis
Definition
inflammation of diverticula; abdominal pain and rectal bleeding are symptoms
Term
diverticulosis
Definition
abnormal side pockets (outpouchings) in the intestinal wall
Term
dopamine
Definition
a CNS neurotransmitter, deficient in patient with Parkinson disease
Term
dorsal
Definition
pertaining to the back, or posterior portion of the body
Term
dorsiflexion
Definition
backward (upward) bending of the foot
Term
duodenal
Definition
pertaining to the duodenum
Term
duodenum
Definition
first part of the small intestine, measuring 12 inches long
Term
dura mater
Definition
thick, outermost layer of the meninges surrounding and protecting the brain and spinal cord
Term
dyscrasia
Definition
blood disease
Term
dysentery
Definition
painful, inflamed intestines resulting from ingestion of food or water containing bacteria, amoebae, or viruses.
Term
dyskinesia
Definition
difficulty in performing voluntary movements
Term
dyslexia
Definition
difficulty in reading, writing, and learning
Term
dysmenorrhea
Definition
painful, difficult menses (menstruation)
Term
dyspareunia
Definition
painful sexual intercourse
Term
dyspepsia
Definition
painful digestion; indigestion
Term
dysphagia
Definition
difficulty in swallowing
Term
dysphasia
Definition
difficulty in talking
Term
dysphonia
Definition
abnormal voice or sound produced by speaking
Term
dysplasia
Definition
condition of abnormal formation
Term
dysplastic
Definition
pertaining to abnormal formation or development of cells; not clearly malignant
Term
dysplastic nevi
Definition
numerous abnormal moles with irregular borders, indistinct margins, and mixed coloration; often precursors of malignant melanomas
Term
dyspnea
Definition
abnormal or difficult breathing
Term
dystocia
Definition
difficult childbirth
Term
dysuria
Definition
painful urination
Term
ear thermometry
Definition
measurement of the temperature of the tympanic membrane by detection of infrared radiation from the eardrum
Term
ecchymosis (pl. ecchymoses)
Definition
bleeding into the skin; bruise
Term
eccrine sweat gland
Definition
water-producing exocrine gland in the skin
Term
echocardiography
Definition
sound waves are used to image the structure of the heart
Term
eclampsia or preeclampsia
Definition
abnormal condition associated with pregnancy, marked by high blood pressure, proteinuria (loss of protein in urine), and edema
Term
ectopic pregnancy
Definition
implantation of the fertilized egg in any site not in the normal location (uterus); a fallopian tube is the most common ectopic side
Term
eczema
Definition
chronic dermatitis of unknown etiology, marked by redness, blisters, scales, and scabs
Term
edema
Definition
swelling; an accumulation of an excessive amount of watery fluid in cells or intercellular tissues
Term
efferent nerves
Definition
carry messages away from the brain and spinal cord; motor nerves
Term
ejaculation
Definition
ejection of sperm and fluid from the male urethra
Term
ejaculatory duct
Definition
tube through which semen enters the male urethra
Term
electrocardiogram
Definition
record of the electricity flowing through the heart
Term
electrocardiography
Definition
process of recording the electricity flowing through the heart
Term
electrocautery
Definition
use of a needle or snare heated by electric current to destroy or burn tissue (removal of warts, polyps)
Term
electrodesiccation
Definition
destruction of tissue by burnng with an electric spark
Term
electroencephalogram
Definition
record of the electricity within the brain
Term
electroencephalography
Definition
process of recording the electricity in the brain
Term
electroencephalography (EEG)
Definition
recording of the electrical activity of the brain
Term
electrolyte
Definition
mineral salt found in the blood and tissues and necessary for proper functioning of cells; potassium, sodium, and calcium are examples; a chemical element that carries an electrical charge when dissolved in water; essential to cellular function and transmission of impulses in nerve and muscle fibers
Term
electromyography
Definition
process of recording the strength of muscle contraction as a result of electrical stimulation
Term
electron beams
Definition
low-energy beams of radiation for treatment of skin or surface tumors
Term
electrophoresis
Definition
technique used to separate serum proteins by electrical charge
Term
elimination
Definition
act or removal of materials from the body; in the digestive system, the removal of indigestible materials
Term
embolic stroke
Definition
refers to the blockage of an artery by an embolus, a travelling particle or debris in the arterial bloodstream originating from elsewhere
Term
embolus (pl. emboli)
Definition
a clot or other substance that travels to a distant location and suddenly blocks a blood vessel
Term
embryo
Definition
stage in prenatal development from 2 to 8 weeks
Term
emesis
Definition
vomiting
Term
emetic
Definition
drug that promotes vomiting
Term
emmetropia
Definition
the condition of the normal eye when parallel rays are focused exactly on the retina and vision is perfect
Term
emphysema
Definition
hyperinflation of air sacs with destruction of alveolar walls
Term
empyema
Definition
pus in the pleural space (cavity) surrounding the lungs
Term
emulsification
Definition
physical process of breaking up large fat globules into smaller globules, thereby increasing the surface area that enzymes can use to digest the fat
Term
en bloc resection
Definition
removal of a tumor with a large area of surrounding tissue containing lymph nodes
Term
enamel
Definition
hard, outermost layer of a tooth
Term
encapsulated
Definition
surrounded by a capsule; benign tumors are encapsulated
Term
encephalitis
Definition
inflammation of the brain
Term
encephalopathy
Definition
diseases of the brain
Term
endarterectomy
Definition
surgical removal of plaque from the inner layer of an artery
Term
endemic goiter
Definition
hypofunctional enlargement of the thyroid gland involving thyroxine due to lack of iodine in the diet
Term
endocarditis
Definition
inflammation of the endocardium (inner lining of the heart)
Term
endocardium
Definition
the inner lining of the heart
Term
endocervicitis
Definition
inflammation of the inner lining of the cervix (lower, neck-like portion of the uterus)
Term
endocrine drug
Definition
drug that is a hormonre or hormone-like; androgens, estrogens, glucocorticoids
Term
endocrine glands
Definition
release specific chemical messengers called hormones into the bloodstream which regulate the many and varied functions of an organism
Term
endocrinologist
Definition
medical specialist in the diagnosis and treatment of endocrine gland disorders
Term
endocrinology
Definition
endocrinology is the study of the endocrine glands
Term
endodontist
Definition
a dentist specializing in the inner parts of the tooth
Term
endolymph
Definition
fluid within the labyrinth (canals) of the inner ear; conducts sound waves
Term
endometriitis
Definition
inflammation of the inner lining of the uterus (upper portion)
Term
endometriosis
Definition
endometrial tissue located outside the uterus
Term
endometrium
Definition
inner, mucous membrane lining of the uterus
Term
endoplasmic reticulum
Definition
a network of canals within the cell containing ribosomes that manufacture proteins
Term
endoscope
Definition
instrument to visually examine the interior of the body; bronchoscope and colonoscope are examples.
Term
endoscopy
Definition
process of visual examination within the body
Term
endothelium
Definition
innermost lining of blood vessels
Term
endotracheal
Definition
pertaining to within the trachea
Term
endotracheal intubation
Definition
tube is placed through the mouth and throat into the trachea to establish an airway
Term
enteritis
Definition
inflammation of the small intestine
Term
enterocolitis
Definition
inflammation of the small intestine and colon
Term
enterocolostomy
Definition
new surgical connection between parts of the small intestine and colon; anastomosis
Term
enteropathy
Definition
disease condition of the intestines, often the small intestine
Term
enteroplasty
Definition
surgical repair of intestines
Term
enucleation
Definition
removal of an entire mass or part without rupture; removal of the eyeball from the orbit of the eye
Term
enuresis
Definition
bedwetting; literally, "in urine"
Term
enzyme
Definition
a chemical that speeds up a reaction between substances. Enzymes are given names that end in -"ase".
Term
eosinophil
Definition
white blood cell whose granules stain intensely with an acidic eosin (reddish) dye; elevated in allergic reactions
Term
eosinophilia
Definition
increase in numbers of eosinophils in the bloodstream, seen in allergic conditions
Term
ependymal cell
Definition
a glial cell that lines membranes within the brain and spinal cord where cerebrospinal fluid circulates
Term
ependymoma
Definition
a tumor that arises from the ependyma, a tissue of the central nervous system. Usually, in children the location is intracranial, while in adults it is spinal.
Term
epidermis
Definition
top (outer) layer of skin
Term
epidermoid
Definition
resembling epidermis or the outer layer of skin. Epidermoid tumors are composed of thin, plate-like cells.
Term
epidermolysis
Definition
loosening of outer layer of the skin with formation of large blisters (bullae)
Term
epididymis
Definition
one of a pair of long, tightly coiled tubes lying on top of each testis. It carries sperm from the seminiferous tubules to the vas deferens. (Plural: epididymides)
Term
epididymitis
Definition
inflammation of the epididymis
Term
epidural hematoma
Definition
collection of blood located above the dura mater
Term
epigastric
Definition
pertaining to above or upon the stomach
Term
epigastric region
Definition
the upper middle region of the abdomen, between the right and left hypochondriac regions
Term
epiglottis
Definition
thin piece of cartilage that covers the entrance to the voice box and windpipe when a person is swallowing
Term
epiglottitis
Definition
inflammation of the epiglottis
Term
epilepsy
Definition
chronic brain disorder characterized by recurrent seizure activity
Term
epinephrine (adrenaline)
Definition
hormone secreted by the adrenal medulla; increases heart rate and blood pressure and dilates airways; part of the body's fight or flight reaction.
Term
epiphyseal plate
Definition
layer of cartilage at the ends of long bones where lengthwise bone growth takes place
Term
epiphysis
Definition
each end of a long bone
Term
episiotomy
Definition
incision of the vulva (perineum) to widen the opening of the vagina during a difficult childbirth
Term
epistaxis
Definition
nosebleed
Term
epithelial cells
Definition
cells arranged in layers and covering or lining a surface of the body
Term
epithelium
Definition
layer of cells covering the external surface of the body and lining the hollow tubes within the body
Term
erectile dysfunction
Definition
inability of an adult male to achieve an erection; impotence
Term
erosion
Definition
wearing away or loss of epidermis
Term
eructation
Definition
gas expelled from the stomach through the mouth
Term
erythema
Definition
condition of redness of the skin
Term
erythematous
Definition
pertaining to redness of the skin
Term
erythroblast
Definition
immature, developing red blood cell
Term
erythroblastosis fetalis
Definition
hemolytic disease in the newborn caused by a blood group (Rh factor) incompatibility between the mother and the fetus
Term
erythrocyte
Definition
red blood cell
Term
erythrocyte sedimentation rate
Definition
measurement of the speed at which erythrocytes settle or fall to the bottom of a test tube
Term
erythrocytopenia
Definition
deficiency of red blood cells
Term
erythromycin
Definition
antibiotic that is extracted from a red (erythr/o) mold (-mycin)
Term
erythropenia
Definition
deficiency of red blood cells
Term
erythropoiesis
Definition
formation of red blood cells
Term
erythropoietin (EPO)
Definition
hormone secreted by the kidney to stimulate the production of red blood cells by bone marrow
Term
esophageal
Definition
pertaining to the esophagus
Term
esophageal atresia
Definition
congenital absence of the normal opening from the esophagus to the stomach
Term
esophageal varices
Definition
swollen, varicose veins at the lower end of the esophagus
Term
esophagus
Definition
tube connecting the throat to the stomach
Term
esotropia
Definition
turning inward of one or both pupils; cross-eyes
Term
estradiol
Definition
estrogen secreted by the ovaries; develops and maintains female sex characteristics
Term
estrogen
Definition
female hormone secreted by the ovaries and to a lesser extent by the adrenal cortex. Examples are estradiol and estrone.
Term
estrogen receptor assay
Definition
test for the presence of a hormone receptor on breast cancer cells
Term
estrogenic
Definition
pertaining to having an action similar to that of an estrogen
Term
ethmoid bone
Definition
thin, delicate bone that supports the nasal cavity and forms part of the orbits of the eye
Term
etiology
Definition
study of the cause of disease
Term
eunuch
Definition
boy who is castrated before puberty
Term
euphoria
Definition
condition of exaggerated well-being (good feeling)
Term
eurthyroid
Definition
normal functioning of the thyroid gland
Term
eustachian tube
Definition
channel between the middle ear and the throat; auditory tube
Term
euthyroid
Definition
normal thyroid function
Term
eversion
Definition
turning outward
Term
exanthematous viral disease
Definition
rash (exanthem) of skin due to viral infection; measles (rubeola) and chicken pox (varicella) are examples
Term
excision
Definition
process of cutting out; removal; resection
Term
excisional biopsy
Definition
removal of tumor and a margin of normal tissue
Term
exenteration
Definition
wide resection involving removal of the tumor, its organ of origin, and all surrounding tissue in the body space
Term
exfoliative cytology
Definition
cells are scraped from a region of suspected disease and examined under the microscope
Term
exocrine glands
Definition
glands that secrete chemicals to the outside of the body
Term
exophthalmometry
Definition
measurement of eyeball protrusion
Term
exophthalmos
Definition
protrusion of the eyeball (proptosis); symptom of hyperthyroidism
Term
exostosis (pl. exostoses)
Definition
benign tumor (bony growth) arising from the surface of a bone
Term
exotropia
Definition
turning to the side or outward of one or both pupils
Term
expectorant drugs
Definition
agents that promote the clearance of mucus from the respiratory tract
Term
expectoration
Definition
coughing up of mucus or sputum from the throat and respiratory tract
Term
expiration
Definition
process of breathing out or exhalation
Term
extension
Definition
lengthening or straightening a flexed limb; increasing the angle between two bones
Term
external beam radiation
Definition
radiation applied to a tumor from a distant source
Term
external respiration
Definition
exchange of gases at the lungs
Term
extracorporeal circulation
Definition
use of a heart-lung machine to divert blood from the heart and lungs during open heart surgery
Term
exudate
Definition
collection of fluid, cells, or other substances that slowly leave cells or capillaries through pores or breaks in cell membranes
Term
facial
Definition
pertaining to the face
Term
facial bones
Definition
bones of the face; lacrimal, mandibular, maxillary, nasal, vomer, and zygomatic bones
Term
fallopian tube
Definition
one of a pair of ducts through which the ovum travels to the uterus
Term
fascia
Definition
fibrous membrane separating and enveloping muscle
Term
fasciectomy
Definition
removal of fascia
Term
fasting blood sugar
Definition
the circulating sugar level is measured in a patient who has fasted for at least 4 hours; a test for diabetes mellitus.
Term
fatty acid
Definition
substances produced when fats are digested
Term
feces
Definition
solid wastes; stools
Term
femoral
Definition
pertaining to the femur
Term
femur
Definition
thigh bone
Term
fenestration
Definition
condition of having a window or aperture
Term
fertilization
Definition
union of the sperm cell and ovum from which the embryo develops
Term
fetal presentation
Definition
manner in which the fetus enters the birth canal
Term
fetus
Definition
stage in development from 8 weeks to birth
Term
fiberoptic colonoscopy
Definition
visual examination of the colon using a fiberoptic instrument (endoscope)
Term
fibrillation
Definition
random, rapid, inefficient, irregular contractions of the atria (AF or A-Fib) or ventricles (VF or V-Fib)
Term
fibrin
Definition
protein threads that form the basis of a blood clot
Term
fibrinogen
Definition
plasma protein that is converted to fibrin in the clotting process
Term
fibrocystic disease
Definition
numerous small sacs of fibrous connective tissue and fluid in the breast
Term
fibroids
Definition
benign tumors in the uterus (leiomyomata or leiomyomas)
Term
fibromyalgia
Definition
chronic pain and stiffness in muscles and fibrous tissue, especially in the shoulders, neck, hips, and knees
Term
fibrosarcoma
Definition
malignant tumor of fibrous or connective tissue
Term
fibrosis
Definition
abnormal condition (proliferation) of fibrous connective tissue occurring in the lung as a side effect of radiation for lung cancer
Term
fibula
Definition
smaller of the two lower leg bones
Term
fibular
Definition
pertaining to the fibula
Term
fields
Definition
dimensions of the size of radiation used to treat a tumor from a specific angle
Term
filtration
Definition
passive process whereby some substances, but not all, pass through a filter or other material
Term
fimbriae (plural)
Definition
finger- or fringe-like projections at the end of the fallopian tubes
Term
fissure
Definition
groove or crack-like sore; narrow, slit-like opening in or between bones
Term
flagellum
Definition
hair-like projection on a sperm cell that makes it motile (able to move)
Term
flatus
Definition
gas expelled through the anus. Also called flatulence.
Term
flexion
Definition
bending a part of the body
Term
flexion
Definition
decreasing the angle between two bones, as in bending a limb
Term
fluorescein angiography
Definition
process of recording (viewing and photographing) the circulation of a fluorescein dye through the blood vessels of the retina
Term
fluorescence
Definition
emission of glowing light results from exposure to and absorption of radiation from x-rays
Term
fluoroscopy
Definition
x-ray technique that produces a fluorescent image on an image intensifier
Term
flutter
Definition
rapid, but regular contractions of the heart, usually of the atria
Term
folic acid vitamins
Definition
vitamin supplements, primarily folic acid, given to pregnant women. Folic acid has been shown to significantly reduce the risk of neural defects such as spina bifida. It is also used to treat certain types of anemia.
Term
follicle-stimulating hormone (FSH)
Definition
secreted by the anterior lobe of the pituitary gland; stimulates hormone secretion and egg production by the ovaries and sperm production by the testes
Term
follicular
Definition
pertaining to forming small, glandular sacs
Term
fontanelle
Definition
soft spot between skull bones of an infant
Term
foramen
Definition
opening or passage in bones where blood vessels and nerves enter and leave
Term
foramen magnum
Definition
opening in inferior occipital bone through which the spinal cord passes
Term
fossa
Definition
shallow cavity in a bone
Term
fovea centralis
Definition
tiny pit or depression in the retina that is the region of clearest vision
Term
fractionation
Definition
giving radiation in small, repeated doses
Term
fraternal twins
Definition
two infants born of the same pregnancy from two separate ova fertilized by two different sperm.
Term
frontal bone
Definition
skull bone that forms the forehead and bony sockets that contain the eyes
Term
frontal plane
Definition
a vertical plane passing through the body and dividing it into the front and back portions; coronal plane
Term
fulguration
Definition
destruction of tissue by electric sparks generated by a high-frequency current
Term
fundus of the eye
Definition
large, posterior inner part of the eye that is visualized with an ophthalmoscope
Term
fungal tests
Definition
scrapings from skin lesions are sent to a laboratory for culture and microscopic examination for evidence of fungal growth
Term
fungating tumor
Definition
gross description of tumor growth in which cells pile one on top of another and project from the tissue surface
Term
gait
Definition
manner of walking
Term
galactorrhea
Definition
excessive or abnormal secretion of milk after breast-feeding has ended
Term
gallbladder
Definition
small sac under the liver; stores bile
Term
gallium scan
Definition
radioisotope (gallium 67) is injected intravenously and has an affinity for tumors and other lesions
Term
gamete
Definition
male or female sexual reproductive cell; sperm cell or ovum
Term
gamma camera
Definition
machine to detect gamma rays emitted from radiopharmaceuticals during scanning for diagnostic purposes
Term
gamma rays
Definition
high-energy rays emitted by radioactive substances in tracer studies
Term
ganglion (pl. ganglia)
Definition
collection of nerve cell bodies in the peripheral nervous system (outside the brain and spinal cord)
Term
ganglion or wrist tendon
Definition
cystic mass arising from a tendon in the wrist
Term
gangrene
Definition
death of tissue associated with loss of blood supply
Term
gastic
Definition
pertaining to the stomach
Term
gastrectomy
Definition
removal or excision of the stomach
Term
gastric bypass
Definition
reducing the size of the stomach and diverting food to the jejunum (gastrojejunostomy)
Term
gastric carcinoma
Definition
malignant tumor of the stomach
Term
gastroduodenal anastomosis
Definition
new surgical opening between the stomach and duodenum
Term
gastroenteritis
Definition
inflammation of the stomach and intestines
Term
gastroenterology
Definition
process of study of stomach and intestines
Term
gastroesophageal reflux disease (GERD)
Definition
solids and fluids return to the mouth from the stomach
Term
gastrointestinal drug
Definition
drug that affects the stomach and intestine
Term
gastrointestinal endoscopy
Definition
visual examination of the GI tract using an endoscope, such as: esophagogastroduodenoscopy (EGD), colonoscopy, sigmoidoscopy, proctoscopy, or anoscopy
Term
gastrointestinal tract
Definition
the tubular system related to the stomach and intestines beginning with the mouth and ending with the anus
Term
gastrojejunostomy
Definition
reducing the size of the stomach and diverting food to the jejunum (gastric bypass)
Term
gastroparesis
Definition
loss of motility of the stomach muscles, occurring as a long-term secondary complication of diabetes mellitus
Term
gastrostomy
Definition
new opening of the stomach through the abdominal wall to the outside of the body
Term
gastrotomy
Definition
process of cutting (incising) the stomach
Term
generic name
Definition
legal, noncommercial name for a drug
Term
genes
Definition
segments of DNA that determine heredity
Term
genetic screening
Definition
family members are tested to determine whether they have inherited a cancer-causing gene
Term
genitalia
Definition
reproductive organs; also called genitals
Term
gestation
Definition
period from fertilization of the ovum to birth
Term
gigantism
Definition
hypersecretion of growth hormone from the anterior pituitary gland before puberty, leading to abnormal overgrowth of body tissues
Term
gingivectomy
Definition
removal of gum tissue
Term
gingivitis
Definition
inflammation of gums
Term
glans penis
Definition
sensitive tip of the penis
Term
glaucoma
Definition
fluid accumulation in the anterior and posterior chambers of the eye causing increased pressure and damage to the retina
Term
glial cell (neuroglial cell)
Definition
cell in the nervous system that is supportive and connective in function. Examples are astrocytes, microglial cells, ependymal cells, and oligodendrocytes.
Term
glioblastoma
Definition
rapidly growing malignant tumor of the brain
Term
glioblastoma multiforme
Definition
highly malignant brain tumor composed of glial cells (astrocytes)
Term
glioma
Definition
a type of tumor that starts in the brain or spine. It is called a glioma because it arises from glial cells.
Term
globulins
Definition
major blood proteins; immunoglobulins, alpha, beta and gamma globulins are examples
Term
glomerular
Definition
pertaining to a glomerulus
Term
glomerulonephritis
Definition
inflammation of the kidney glomerulus
Term
glomerulus
Definition
tiny ball of capillaries in cortex of kidney (plural: glomeruli)
Term
glossopharyngeal
Definition
pertaining to the tongue and throat
Term
glottis
Definition
slit-like opening between the vocal folds of the larynx
Term
glucagon
Definition
hormone secreted by the pancreas (alpha islet cells); increases blood glucose (sugar) by conversion of glycogen (starch) to glucose
Term
glucocorticoid
Definition
steroid hormone secreted by the adrenal cortex; regulates glucose, fat, and protein metabolism; raises blood sugar and reduces tissue inflammation; cortisol
Term
gluconeogenesis
Definition
process of producing new sugar from fats and proteins; occurs mainly in the liver
Term
glucose
Definition
simple sugar
Term
glucose tolerance test
Definition
measures the glucose levels in a blood sample taken at various intervals from a patient who has previously ingested glucose
Term
glycemic
Definition
pertaining to blood sugar
Term
glycogen
Definition
animal starch broken down to produce glucose; glucose is stored in the form of glycogen in liver cells
Term
glycogenolysis
Definition
breakdown of glycogen to release sugar (glucose)
Term
glycolysis
Definition
breakdown of sugar to release energy in body cells
Term
glycosuria
Definition
sugar in urine
Term
glycosylated hemoglobin test (HbA1c or A1c)
Definition
measures long-term glucose control. A high level indicates poor glucose contol in diabetic patients.
Term
goiter
Definition
enlargement of the thyroid gland
Term
gonad
Definition
female or male reproductive organ that produces sex cells and hormones; ovary or testis
Term
gonadotropic hormone (gonadotropin)
Definition
hormone secreted by the anterior lobe of the pituitary gland and acting on the ovaries or testes
Term
gonorrhea
Definition
(STD) inflammation of the genital tract mucous membranes, caused by infection with gonococci
Term
gouty arthritis
Definition
inflammation of joints caused by excessive uric acid in the blood and uric acid crystals deposited in joints
Term
grading of tumors
Definition
evaluating the degree of maturity of tumor cells or indication of malignant transformation
Term
graft
Definition
tissue that is transplanted or implanted
Term
granulocyte
Definition
white blood cell with numerous dark-staining granules; neutrophil, eosinophil and basophil
Term
granulocytopenia
Definition
deficiency of granulocytes
Term
granulocytosis
Definition
increased numbers of granulocytes in the blood
Term
gray (Gy)
Definition
unit of absorbed radiation dose
Term
greenstick fracture
Definition
one side of the bone is fractured; the other side is bent
Term
gross description of tumors
Definition
visual appearance of tumors to the naked eye: cystic, fungating, inflammatory, medullary, necrotic, polypoid, ulcerating, and verrucous tumors
Term
growth hormone (GH); somatotropin (STH)
Definition
hormone secreted by the anterior lobe of the pituitary gland; stimulates growth of bones and soft tissues
Term
guaiac
Definition
chemical from the wood of trees. When added to a stool sample, it reacts with any blood present in the feces.
Term
gynecologist
Definition
specialist in the study of female reproductive system
Term
gynecology
Definition
process of study of the diseases of women, particularly those affecting the female reproductive system including the breasts
Term
gynecomastia
Definition
female-like breast enlargement in a male
Term
gyrus (pl. gyri)
Definition
sheet of nerve cells that produces a rounded fold on the surface of the cerebellum; convolution
Term
hair follicle
Definition
tubular sac that holds the hair fiber
Term
half-life
Definition
time required for a radioactive substance to lose half its radioactivity by disintegration
Term
haversian canals
Definition
minute spaces for blood vessels in compact bone
Term
heart transplantation
Definition
donor heart is transferred to a recipient
Term
helper T cell
Definition
lymphocyte that aids a B cell lymphocyte in recognizing antigens and stimulating antibody production
Term
hemarthrosis
Definition
condition of blood in a joint
Term
hematemesis
Definition
vomiting blood
Term
hematochezia
Definition
passage of fresh, bright red blood from the rectum
Term
hematocrit
Definition
percentage of red blood cells in a given volume of blood
Term
hematology
Definition
process of study of blood and blood disorders
Term
hematoma
Definition
collection or mass of blood
Term
hematopoiesis
Definition
blood cell development and formation
Term
hematopoietic stem cell
Definition
bone marrow cell; gives rise to many types of blood cells
Term
hematopoietic stem cell transplant
Definition
peripheral (found in the blood) stem cells from a compatible donor are administered into the vein of a recipient
Term
hematuria
Definition
blood in the urine
Term
heme
Definition
iron-containing nonprotein portion of the hemoglobin molecule
Term
hemianopsia
Definition
absence of vision for one half, right or left, of an individual's field of vision
Term
hemiglossectomy
Definition
removal (resection) of half the tongue
Term
hemiparesis
Definition
slight paralysis of the right or left half of the body
Term
hemiplegia
Definition
paralysis of the right or left half of the body
Term
hemochromatosis
Definition
excessive deposits of iron throughout the body
Term
hemoglobin
Definition
blood protein containing iron; carries oxygen in red blood cells
Term
hemoglobin test
Definition
total amount of hemoglobin in a sample of blood
Term
hemoglobinopathy
Definition
disease or defect of hemoglobin production. Sickle cell anemia is an example.
Term
hemolysis
Definition
destruction or breakdown of blood; specifically red blood cells
Term
hemolytic anemia
Definition
reduction in erythrocytes due to excessive destruction of red blood cells
Term
hemophilia
Definition
hereditary disease of blood clotting failure with abnormal bleeding. Affected individuals are lacking a blood clotting factor (factor VIII or factor IX).
Term
hemoptysis
Definition
spitting or coughing up blood as result of bleeding from any part of the respiratory tract
Term
hemorrhage
Definition
bursting forth or excessive flow of blood
Term
hemorrhagic stroke
Definition
stroke due to rupture of a blood vessel or an abnormal vascular structure
Term
hemorrhoids
Definition
swollen, twisted veins in the rectal and anal region
Term
hemostasis
Definition
to stop or control the escape of blood by artificial means or by clotting; stoppage of bleeding or circulation of blood
Term
hemothorax
Definition
blood in the chest (pleural cavity) surrounding the lungs
Term
heparin
Definition
anticoagulant found in blood and tissues
Term
hepatitis
Definition
inflammation of the liver
Term
hepatoma
Definition
tumor (malignant) of liver cells; hepatocellular carcinoma
Term
hepatomegaly
Definition
enlargement of the liver
Term
hernia
Definition
protrusion of an organ or part through the muscle normally containing it
Term
herniation of an intervertebral disk (disc)
Definition
abnormal protrusion of a fibrocartilaginous intervertebral disk into the neural canal or spinal nerves
Term
herniorrhaphy
Definition
suture (stitching or sewing up) a hernia
Term
herpes genitalis
Definition
(STD) infection of the skin and mucosa of the genitals, caused by the herpes simplex virus (HSV) and marked by blisters
Term
herpes zoster
Definition
viral infection affecting peripheral nerves that causes shingles
Term
herpetic stomatitis
Definition
inflammation of the mouth (gingiva, lips, palate, and tongue) by infection with the herpesvirus. Commonly called fever blisters or cold sores.
Term
hiatal hernia
Definition
protrusion of the upper portion of the stomach upward through the diaphragm
Term
hilar
Definition
pertaining to the hilum
Term
hilum
Definition
depression or hollow in that part of an organ where blood vessels and nerves enter and leave
Term
hilum of the lung
Definition
midline region where the bronchi, blood vessels, and nerves enter and exit the lungs
Term
hirsutism
Definition
excessive hair growth
Term
histology
Definition
process of study of tissues
Term
homeostasis
Definition
tendency in an organism to return to a state of constancy and stablity
Term
hordeolum
Definition
inflammation of an oil-secreting gland in the eyelid; stye
Term
hormonal
Definition
pertaining to a hormone
Term
hormone
Definition
substance, secreted by an endocrine gland, that travels through the blood to a distant organ or gland where it influences the structure or function of that organ or gland
Term
human chorionic gonadotropin (hCG)
Definition
hormone produced by the placenta to sustain pregnancy by stimulating (-tropin) the mother's ovaries to produce estrogen and progesterone
Term
human immunodeficiency virus (HIV)
Definition
virus (retrovirus) that causes AIDS
Term
human immunodeficiency virus (HIV) encephalopathy
Definition
brain disease and dementia occurring with AIDS
Term
humeral
Definition
pertaining to the humerus (upper arm bone)
Term
humerus
Definition
upper arm bone
Term
humoral immunity
Definition
type of immune response in which a B cell lymphocyte transforms into plasma cell and secretes antibodies
Term
hyaline membrane disease
Definition
acute lung disease commonly seen in the premature newborn
Term
hydrarthrosis
Definition
condition of water or fluid in a joint
Term
hydrocele
Definition
sac of clear fluid in the scrotum
Term
hydrocephalus
Definition
abnormal accumulation of fluid (CSF) in the spaces of the brain; in infants, this condition causes enlargement of the head
Term
hydrochloric acid
Definition
substance produced by the stomach; necessary for digestion of food
Term
hydronephrosis
Definition
abnormal condition of fluid build-up in the kidney; caused by obstruction to the flow of urine
Term
hydrotherapy
Definition
treatment using water, whirlpool baths
Term
hydrothorax
Definition
water or fluid that accumulates in the pleural space surrounding the lungs
Term
hymen
Definition
mucous membrane partially or completely covering the opening to the vagina
Term
hypalgesia
Definition
diminished sensitivity to pain
Term
hyperacusis
Definition
excessive sensitivity to sounds
Term
hyperbilirubinemia
Definition
high levels of bilirubin in the blood
Term
hypercalcemia
Definition
high levels of calcium in the bloodstream; often due to hyperparathyroidism; occurs as calcium leaves the bones and enters the bloodstream where it can produce damage to the kidneys and heart
Term
hypercalciuria
Definition
high levels of calcium in urine
Term
hypercapnia
Definition
increased levels of carbon dioxide in the bloodstream
Term
hypercholesterolemia
Definition
high levels of cholesterol in the blood that is a major factor in the development of heart disease. Condition treated with use of statins (anticholesterol drugs)
Term
hyperesthesia
Definition
excessive sensitivity or feeling, especially of the skin in response to touch or pain
Term
hyperglycemia
Definition
high levels of sugar in the bloodstream; often associated with diabetes mellitus
Term
hyperinsulinism
Definition
exessive secretion of insulin from the beta islet cells of the pancreas causing hypoglycemia
Term
hyperkalemia
Definition
high levels of potassium in the blood
Term
hyperkinesis
Definition
excessive movement
Term
hyperopia
Definition
farsightedness; light rays are focused beyond, instead of directly on the retina
Term
hyperparathyroidism
Definition
increased secretion of parathormone from the parathyroid glands
Term
hyperplasia
Definition
condition of increased formation of normal cells
Term
hyperpnea
Definition
increase in breathing rate
Term
hypersensitivity
Definition
abnormal condition characterized by an exaggerated response of the immune system to an antigen
Term
hypersplenism
Definition
syndrome of spleen enlargement (splenomegaly) and destruction of red blood cells (hemolysis)
Term
hypertension (HTN)
Definition
high blood pressure
Term
hypertensive retinopathy
Definition
disease of the retina due to high blood pressure
Term
hyperthyroidism
Definition
secretion by thyroid gland of a greater than normal amount of thyroxine (thyroid hormone, or T4)
Term
hypertrophy
Definition
increase in size of tissue or an organ due to increase in size of individual cells
Term
hyperuricemia
Definition
increase in uric acid in the blood
Term
hypnotic
Definition
drug that promotes sleep or a trance-like state (hypnosis)
Term
hypocalcemia
Definition
low levels of calcium in the blood; results as calcium remains in bones and is unable to enter the bloodstream
Term
hypochondriac region
Definition
an upper abdominal area on either side of the epigastric region beneath the cartilage of the lower ribs
Term
hypochromic
Definition
pertaining to deficiency in color; decrease in hemoglobin in red blood cells
Term
hypodermic
Definition
pertaining to under the skin
Term
hypodermic injection
Definition
placement of a needle below the skin
Term
hypogastric
Definition
pertaining to below the stomach
Term
hypogastric region
Definition
lower middle region below the umbilical region between the right and left inguinal regions.
Term
hypoglossal
Definition
pertaining to under the tongue
Term
hypoglycemia
Definition
low levels of sugar in the blood that occurs as insulin draws sugar out of the bloodstream
Term
hypogonadism
Definition
deficient functioning of the gonads
Term
hypoinsulinism
Definition
deficient production of insulin
Term
hypokalemia
Definition
low levels of potassium in the blood
Term
hyponatremia
Definition
low levels of sodium in the blood
Term
hypoparathyroidism
Definition
decreased secretion of parathormone from the parathyroid gland
Term
hypophysectomy
Definition
removal of the pituitary gland
Term
hypophysis
Definition
pituitary gland
Term
hypopituitarism
Definition
deficient secretion of hormones from the pituitary gland
Term
hypopituitary dwarfism
Definition
congenital hyposecretion of growth hormone from the anterior pituitary gland
Term
hypospadias; hypospadia
Definition
congenital abnormality in which the male urethral opening is on the undersurface of the penis instead of at its tip
Term
hypothalamus
Definition
portion of the brain beneath the thalamus; controls sleep, appetite, body temperature, and secretions from the pituitary gland
Term
hypothyroidism
Definition
decreased secretion of thyroid hormones from the thyroid gland
Term
hypoxia
Definition
deficiency of oxygen in body tissues
Term
hysterectomy
Definition
removal of the uterus
Term
hysterosalpingogram
Definition
x-ray record of the uterus and fallopian tubes after injection of contrast material
Term
hysterosalpingography
Definition
x-ray recording of the uterus and fallopian tubes after injection of contrast material
Term
hysteroscopy
Definition
visual examination (endoscopic) of the uterus
Term
hysterosonogram
Definition
ultrasound examination of uterine cavity
Term
iatrogenic
Definition
pertaining to produced by a treatment or a procedure
Term
ichthyosis
Definition
hereditary condition in which the skin resembles fish scales and is dry, rough, and scaly
Term
ictal event
Definition
pertaining to a sudden, acute onset, as the convulsions of an epileptic seizure
Term
icterus
Definition
jaundice. The scientific name of orioles is Icterus, from the Greek word ikteros for jaundice. This not only is a reference to the color, but also to the revelation that sighting this bird was suppose to cure a person with jaundice.
Term
identical twins
Definition
two infants resulting from division of one fertilized egg into two distinct embryos. Conjoined ("Siamese") twins are incompletely separated identical twins.
Term
idiopathic
Definition
pertaining to unknown cause of disease
Term
idiosyncrasy
Definition
unexpected effect produced in a particularly sensitive individual, but not seen in most patients
Term
ileal conduit
Definition
after cystectomy, a pouch is formed from a segment of the ileum that is used in place of the bladder to carry urine from the ureters out of the body
Term
ileitis
Definition
inflammation of the ileum (third part of the small intestine)
Term
ileocecal sphincter
Definition
ring of muscles that are between the ileum and the cecum (first part of the large intestine). Also called the ileocecal valve.
Term
ileostomy
Definition
surgical formation of an artificial opening from the ileum to the outside of the body through the abdominal wall
Term
ileum
Definition
third part of the small intestine
Term
ileus
Definition
failure of peristalsis with resulting obstruction of the intestines
Term
iliac
Definition
pertaining to the ilium (upper and largest portion of the pelvic bone)
Term
ilium
Definition
upper and largest portion of the pelvic (hip) bone
Term
immune response
Definition
the body's capability to resist foreign organisms and toxins that can damage tissue and organs
Term
immune system
Definition
response of the immune system to foreign invasion
Term
immunoglobulin
Definition
antibody-containing protein in the blood (IgA, IgM, IgD, IgE) secreted by B-cell lymphocytes (plasma cells)
Term
immunosuppression
Definition
blocking or turning off the normal immune response
Term
immunotherapy
Definition
use of immunologic techniques to treat disease
Term
impacted fracture
Definition
broken bone in which one fragment is driven firmly into the other fragment
Term
impetigo
Definition
inflammatory bacterial skin disease characterized by vesicles, pustules, and crusted-over lesions
Term
implantable cardioverter defibrillator (ICD)
Definition
small electric device implanted inside the chest (near the collarbone) to sense arrhythmias and terminate them to restore normal sinus rhythm
Term
impotence
Definition
inability of an adult male to achieve an erection
Term
in vitro
Definition
process, test, or procedure is performed, measured, or observed outside a living organism
Term
in vivo
Definition
process, test, or procedure is performed, measured, or observed within a living organism
Term
incision
Definition
process of cutting into or making an incision
Term
incisional biopsy
Definition
piece of tumor is removed for examination to establish a diagnosis
Term
incisor
Definition
one of four front teeth in the dental arch
Term
incus
Definition
small anvil-shaped bone (ossicle) in the middle ear; second ossicle
Term
indwelling or Foley catheter
Definition
remains in the bladder all the time. An inflated balloon on the end of the catheter holds it in place
Term
infarction
Definition
area of dead tissue
Term
infiltrative
Definition
extending beyond normal tissue boundaries
Term
inflammatory bowel disease
Definition
severe inflammation of the small and large intestine (colon); examples are Crohn disease and ulcerative colitis
Term
infracostal
Definition
pertaining to below the ribs
Term
inguinal
Definition
lowermost region of the abdominopelvic area of either side of the hypogastric region, groin
Term
inguinal hernia
Definition
a small loop of the bowel protrudes through a weakened lower abdominal muscle
Term
inguinal node
Definition
lymph node in the groin region
Term
inguinal region
Definition
lowermost region of the abdominopelvic area on either side of the hypogastric region; groin
Term
inhalation
Definition
administration of drugs in gaseous or vapor form through the nose or mouth
Term
insomniac
Definition
pertaining to without sleep; an insomniac is a person who cannot sleep
Term
inspiration
Definition
act of breathing in or inhalation
Term
insulin
Definition
secreted by islets of Langerhans (beta islet cells) of the pancreas. This hormone lowers blood sugar by transport and conversion of glucose to glycogen (starch).
Term
integumentary system
Definition
skin and its accessory organs (hair, nails, sebaceous and sweat glands)
Term
intercostal
Definition
pertaining to between the ribs
Term
interferons
Definition
anti-viral proteins secreted by lymphocytes
Term
interleukins
Definition
proteins (cytokines) that stimulate the immune system including B & T cell lymphocytes
Term
internal respiration
Definition
exchange of gases at the cells within all tissues of the body
Term
interstitial cells
Definition
in the testes, these cells lie between the seminiferous tubules and produce the hormone testosterone
Term
interstitial fluid
Definition
fluid that fills the spaces between cells
Term
interstitial nephritis
Definition
inflammation of the renal interstitium (connective tissue that lies between the renal tubules)
Term
interventional radiology
Definition
therapeutic procedures performed by a radiologist
Term
interventricular septum
Definition
wall between the ventricles of the heart
Term
intervertebral
Definition
pertaining to between vertebrae
Term
intradermal
Definition
shallow injection made into the upper layers of skin and is used chiefly in skin testing for allergic reactions
Term
intraocular
Definition
pertaining to within the eye
Term
intrathecal
Definition
pertaining to within the meninges or membranes surrounding the spinal cord. Drugs may be administered intrathecally.
Term
intrauterine device (IUD)
Definition
device inserted by a physician into the uterus to prevent pregnancy
Term
intravenous
Definition
pertaining to within a vein
Term
intrinsic factor
Definition
substance normally found in gastric juice that helps absorption of vitamin B12 into the bloodstream
Term
intubation
Definition
insertion of a tube into a hollow organ
Term
intussusception
Definition
telescoping of the intestines
Term
invasive
Definition
having the ability to enter and destroy surrounding tissue
Term
inversion
Definition
turning inward
Term
involution of the uterus
Definition
shrinking of the uterus (womb) to its normal size after childbirth
Term
ionization
Definition
transformation of electrically neutral substances into electrically charged particles. X-rays cause ionization of particles within tissues.
Term
iridectomy
Definition
removal of a portion of the iris
Term
iridic
Definition
pertaining to the iris
Term
iris
Definition
colored, pigmented portion of the eye; muscle that changes the size of the pupil
Term
iritis
Definition
inflammation of the iris of the eye
Term
irradiation
Definition
exposure to any form of radiant energy such as light, heat, or x-rays
Term
irritable bowel syndrome
Definition
group of gastrointestinal symptoms associated with stress and tension
Term
ischemia
Definition
holding back blood to a region, organ, or tissue of the body. Myocardial ischemia is deprivation of blood to the heart muscle.
Term
ischial
Definition
pertaining to the ishium (posterior portion of the pelvic bone
Term
ischium
Definition
posterior (back) portion of the pelvic (hip) bone
Term
jaundice
Definition
yellow-orange coloration of the skin and whites of the eyes caused by high levels of bilirubin in the blood (hyperbilirubinemia). Also called icterus
Term
jejunum
Definition
second part of the small intestine
Term
kaposi sarcoma
Definition
malignant tumor of skin and connective tissue; associated with AIDS
Term
kaposi sarcoma
Definition
malignant tumor of skin and blood vessels; often associated with AIDS. Dark blue-purple patches form on the skin.
Term
karyotype
Definition
classification of chromosomes in the nucleus of a cell determined by a photograph taken during cell division
Term
keloid
Definition
enlarged scar on the skin
Term
keratin
Definition
hard protein found in hair, nails, and the epidermis layer of skin
Term
keratitis
Definition
inflammation of the cornea
Term
keratoplasty
Definition
surgical repair of the cornea; corneal transplant
Term
keratosis
Definition
excessive development of hard, keratinized tissue of the skin
Term
ketoacidosis
Definition
ketosis; high levels of acids in the blood resulting from diabetes mellitus (Type 1) when cells burn high levels of fats because sugar is not available as fuel
Term
ketonuria
Definition
presence of ketones in the urine, common in uncontrolled diabetes mellitus
Term
ketosis
Definition
accumulation of large quantities of ketone bodies (acetones) in the blood, ketoacidosis
Term
kidney
Definition
one of two bean-shaped organs behind the abdominal cavity on either side of the backbone in the lumbar region
Term
kidneys, ureters, and bladder (KUB)
Definition
x-ray examination (without contrast) of the kidneys, ureters, and bladder
Term
kinesiology
Definition
study of movement
Term
kyphosis
Definition
abnormal condition of outward curvature (convexity) of the thoracic spine, humpback
Term
labeled compound
Definition
radiopharmaceutical; used in nuclear medicine studies
Term
labia
Definition
lips of the vagina; labia majora are the larger, outermost lips, and labia minora are the smaller, innermost lips
Term
labial
Definition
pertaining to the lip
Term
labioglossopharyngeal
Definition
pertaining to the lips, tongue, and throat
Term
labyrinth
Definition
maze-like series of canals of the inner ear; cochlea, vestibule and semicircular canals
Term
lacrimal
Definition
pertaining to tears
Term
lacrimal bones
Definition
two small facial bones that contain tear glands and canals for the passage of tear ducts
Term
lacrimation
Definition
production of tears
Term
lactation
Definition
production of milk
Term
lactiferous ducts
Definition
tubes that carry milk within the breast
Term
lactogenesis
Definition
production of milk
Term
lamina
Definition
one of two posterior (back) arches of a vertebra
Term
laminectomy
Definition
surgical removal of the posterior portion of a vertebra to relieve pressure on a spinal nerve or spinal cord from a displaced intervertebral disk
Term
laparoscopy
Definition
process of visually examining the contents of the abdominal cavity using small incisions and a laparoscope (endoscope)
Term
laparotomy
Definition
incision through the abdominal wall
Term
laryngeal
Definition
pertaining to the larynx (voice box)
Term
laryngectomy
Definition
excision of the larynx (voice box)
Term
laryngitis
Definition
inflammation of the larynx or voice box
Term
laryngoscopy
Definition
endoscopic visual examination of the larynx
Term
laryngospasm
Definition
involuntary contraction of muscles surrounding the voice box
Term
larynx
Definition
voice box located at the upper region of the trachea
Term
laser photocoagulation
Definition
use of a laser to seal retinal tears and leaky retinal blood vessels
Term
lateral
Definition
pertaining to the side
Term
lateral decubitus
Definition
lying down on one's side with the x-ray beam horizontally positioned
Term
laxative
Definition
weak cathartic; promotes movement of feces through the colon
Term
left ventricle assist device (LVAD)
Definition
booster pump implanted in the abdomen with a tube inserted into the left ventricle. An LVAD is a "bridge to transplant" or destination therapy when heart transplantation is impossible.
Term
leg bag
Definition
catheterization term: collecting bag can be strapped to leg and worn under clothing
Term
leiomyoma
Definition
benign tumor of smooth, involuntary muscle
Term
leiomyomas of the uterus
Definition
benign tumors of the uterus; fibroids
Term
leiomyosarcoma
Definition
malignant tumor of smooth muscle
Term
lens
Definition
transparent biconvex body behind the pupil of the eye
Term
leptomeningitis
Definition
inflammation of the two thinner membranes (arachnoid and pia mater) surrounding the brain and spinal cord
Term
leukapheresis
Definition
mechanical separation of white blood cells from the rest of the blood
Term
leukemia
Definition
disease of high numbers of malignant (cancerous) white blood cells
Term
leukocyte
Definition
white blood cell
Term
leukocytopenia
Definition
deficiency of white blood cells
Term
leukocytosis
Definition
blood condition with slight increase in number of normal white cells
Term
leukoderma
Definition
areas of skin that lose their pigment and become white; vitiligo
Term
leukoplakia
Definition
white plaques on mucus membranes and surfaces of the body
Term
leukorrhea
Definition
white to yellow discharge from the vagina
Term
ligament
Definition
connective tissue binding bones to other bones
Term
ligamentous
Definition
pertaining to a ligament
Term
ligate
Definition
to tie; to apply a ligature
Term
ligation
Definition
application of a ligature to tie off or shut off a vessel or organ
Term
ligature
Definition
thread or wire used to constrict or fasten a structure
Term
linear accelerator
Definition
large electronic device that produces high-energy x-ray beams for treatment of deep-seated tumors
Term
lipase
Definition
pancreatic enzyme necessary to digest fats
Term
lipid tests (lipid profile)
Definition
measurements of cholesterol and triglycerides (fats) in a sample of blood
Term
lipocyte
Definition
fat cell
Term
lipoma
Definition
benign tumor of fatty tissue
Term
lipoprotein electrophoresis
Definition
lipoproteins (combinations of fat and protein) are physically separated in a blood sample. Examples of lipoproteins are HDL (high density lipoprotein protects adults from atherosclerosis) and LDL (low density lipoprotein associated with atherosclerosis).
Term
liposuction
Definition
removal of adipose (fatty) tissue with a suction pump device
Term
lithogenesis
Definition
formation of stone (calculi)
Term
lithotripsy
Definition
process of using high-energy sound waves to crush a stone within the kidney or ureter
Term
liver
Definition
the liver secretes bile; stores sugar, iron, and vitamins; produces blood proteins; and destroys worn-out red blood cells
Term
liver biopsy
Definition
removal of liver tissue followed by microscopic visualization. Helps diagnosis cirrhosis, chronic hepatitis and tumors of liver.
Term
liver function tests
Definition
tests for the presence of enzymes and bilirubin in serum
Term
liver scan
Definition
image of the liver after injecting radioactive material into the blood stream
Term
lobectomy
Definition
removal of a lobe or section of an organ, such as the lung
Term
lordosis
Definition
forward curvature of the lumbar spinal column. In its extreme form it is known as "swayback."
Term
lower esophageal sphincter (LES)
Definition
ring of muscles between the esophagus and the stomach. Also called the cardiac sphincter.
Term
lower gastrointestinal series
Definition
x-ray images of the colon and rectum obtained after injection of barium into the rectum (barium enema)
Term
lumbar puncture (LP)
Definition
CSF is withdrawn from between two lumbar vertebrae
Term
lumbar region
Definition
in the back of the body, the lumbar region is the lower back, just above the sacrum. In the front of the body, it is one of two middle lateral regions on either side of the umbilical region.
Term
lumbar vertebrae
Definition
backbones (5) in the region of the waist (midde section below the chest) (L1-L5)
Term
lumbosacral
Definition
pertaining to the lower bones of the back (lumbar and sacral regions)
Term
lumen
Definition
cavity or channel with a tube or tubular organ, as a blood vessel, vagina, or fallopian tube
Term
lung biopsy
Definition
surgical removal of lung tissue followed by microscopic examination of cells
Term
lung cancer
Definition
malignant tumor arising from the lungs and bronchial tubes
Term
lunula
Definition
semicircular white arch near the root of the nail
Term
luteinizing hormone (LH)
Definition
secreted by the anterior lobe of the pituitary gland (adenohypophysis), stimulates ovulation in females and testosterone secretion in males
Term
lymph
Definition
fluid that circulates within lymph vessels and lymph nodes
Term
lymph capillaries
Definition
tiny lymph vessels that carry lymph through the body
Term
lymph node
Definition
mass of stationary lymphatic tissue along the path of lymph vessels
Term
lymph vessels
Definition
carry lymph throughout the body
Term
lymphadenitis
Definition
inflammation of lymph nodes
Term
lymphadenopathy
Definition
disease of lymph nodes
Term
lymphangiectasia
Definition
widening or dilation of lymph vessels
Term
lymphedema
Definition
abnormal collection of fluid in tissue spaces caused by obstruction of lymph vessels and backflow of lymph
Term
lymphocyte
Definition
white blood cell with a single nucleus (mononuclear) found in blood and lymphatic tissue; fights disease by making antibodies (B cell lymphocytes) or killing cells chemically or by ingestion (T cell lymphocytes)
Term
lymphocytopenia
Definition
deficiency of lymphocytes
Term
lymphocytosis
Definition
increase in numbers of lymphocytes in the bloodstream
Term
lymphoid organs
Definition
organs containing and derived from lymphatic tissue; spleen, thymus gland, and lymph nodes
Term
lymphoma
Definition
malignant tumor of lymph nodes and lymphatic tissue
Term
lymphopoiesis
Definition
formation of lymphocytes
Term
lysis
Definition
destruction
Term
macrocephaly
Definition
condition of a larger than normal head
Term
macrocytosis
Definition
presence of large red blood cells in the blood
Term
macrophage
Definition
large phagocytic cell migrating from the blood into tissues
Term
macrotia
Definition
abnormally large ears
Term
macula
Definition
yellowish region on the retina lateral to and slightly below the optic disc; contains the fovea centralis, the area of clearest and central vision
Term
macular degeneration
Definition
deterioration of the macula of the retina and producing a loss of central vision
Term
macule
Definition
pigmented spot on the skin; freckle
Term
magnetic resonance imaging (MRI)
Definition
magnetic field and radio waves produce images of soft tissues and muscles in all three planes (sagittal, coronal, and axial) of the body
Term
magnetic resonance imaging of the chest
Definition
magnetic waves create images of the chest in all three planes of the body
Term
malaise
Definition
general feeling of bodily discomfort
Term
malignant
Definition
cancerous; harmful
Term
malignant melanoma
Definition
cancerous skin tumor often arising in pre-existing moles (nevi)
Term
malignant tumor
Definition
tending to become worse and result in death; having the characteristics of invasiveness, anaplasia, and metastasis
Term
malleolar
Definition
pertaining to a malleolus
Term
malleolus
Definition
either of two bony enlargements (processes) on each side of an ankle. Lateral malleolus is distal process of fibula; medial malleolus is distal process of tibia.
Term
malleus
Definition
hammer-shaped, small bone (ossicle) in the middle ear
Term
mammary
Definition
pertaining to the breast
Term
mammary papilla
Definition
nipple of the breast. A papilla is any small nipple-shaped projection.
Term
mammogram
Definition
x-ray record of the breast
Term
mammography
Definition
x-ray examination of the breast
Term
mammoplasty
Definition
surgical repair of the breast (augmentation or reduction surgery)
Term
mandible
Definition
lower jaw bone
Term
mandibular
Definition
pertaining to the lower jaw bone
Term
manubrium
Definition
upper portion of the sternum
Term
mastectomy
Definition
excision of a breast
Term
mastication
Definition
chewing
Term
mastitis
Definition
inflammation of a breast
Term
mastoid process
Definition
round projection (process) on the temporal bone behind the ear
Term
mastoiditis
Definition
inflammation and infection of the mastoid process just behind the ear
Term
meatal stenosis
Definition
narrowing of the meatus (opening) leading from the urethra to the outside of the body
Term
meatotomy
Definition
incision of a meatus in order to enlarge it. The urinary meatus is the opening of the urethra to the outside of the body.
Term
meatus
Definition
opening or canal
Term
meconium aspiration syndrome
Definition
abnormal inhalation of meconium (first stools) produced by a fetus or newborn
Term
medial
Definition
pertaining to the middle or midline of the body
Term
mediastinal node
Definition
lymph node in the mediastinum (central area between the lungs in the chest)
Term
mediastinoscopy
Definition
endoscopic visual examination of the mediastinum
Term
mediastinum
Definition
part of the thoracic (chest) cavity between the lungs
Term
medicinal chemistry
Definition
study of new drug synthesis and the relationship between the chemical structure of a drug and its biologic effect
Term
medulla
Definition
inner region; the renal medulla is the inner region of the kidney
Term
medulla oblongata
Definition
part of the brain just above the spinal cord; controls breathing, heartbeat, and the size of blood vessels; nerve fibers cross over here
Term
medullary
Definition
pertaining to the medulla
Term
medullary cavity
Definition
inner section of a bone containing soft bone marrow tissue
Term
medullary tumor
Definition
large, fleshy tumor
Term
megakaryocyte
Definition
large, giant cell with a big nucleus; platelet precursor found in the bone marrow
Term
melanin
Definition
black pigment produced by melanocytes in the basal layer of the epidermis
Term
melatonin
Definition
hormone secreted by pineal gland that induces sleep and affects mood
Term
melena
Definition
black, tarry stools; feces containing digested blood
Term
menarche
Definition
beginning of the first menstrual period during puberty
Term
meningeal
Definition
pertaining to the meninges
Term
meninges
Definition
three protective membrances that surround the brain and spinal cord
Term
meningioma
Definition
tumor (benign) of the meninges
Term
meningitis
Definition
inflammation of the meninges; leptomeningitis
Term
meningocele
Definition
hernia of the meninges through a defect or space between vertebrae; a form of spina bifida cystica
Term
menometrorrhagia
Definition
excessive uterine bleeding during menstruation and also between menstrual periods
Term
menopause
Definition
gradual ending of menstruation
Term
menorrhagia
Definition
excessive flow of blood during menstruation; abnormally heavy or long menstrual periods
Term
menorrhea
Definition
menstruation; monthly discharge of blood from the lining of the uterus
Term
menstruation
Definition
monthly shedding of the uterine lining. The flow of blood and tissue normally discharged during menstruation is called the menses (Latin mensis means month).
Term
mesenchymal
Definition
embryonic connective tissue. This is the tissue from which connective tissues (bone, muscle, fat, cartilage) arise
Term
mesentery
Definition
membrane that holds the intestine together; a fold of the peritoneum attaching the small intestine to the dorsal (back) body wall
Term
mesothelioma
Definition
rare malignant tumor arising in the pleura and associated with asbestos exposure
Term
metabolism
Definition
total of chemical processes that occur in cells; including catabolism and anabolism
Term
metacarpal bones
Definition
hand bones
Term
metacarpals
Definition
hand bones
Term
metamorphosis
Definition
condition of change of shape or form
Term
metaphysis
Definition
flared portion of a long bone, between the diaphysis (shaft) of the bone and the epiphyseal plate at the end of the bone
Term
metaplasia
Definition
conversion of normal cells into a less differentiated type in response to chronic stress or injury
Term
metastasis
Definition
spread of a malignant tumor beyond its original location to a distant, secondary site; literally beyond (meta-) control (stasis). Plural form is metastases.
Term
metastatic bone lesion
Definition
malignant tumor that has spread to bone from the breast, lung, kidney, or prostate gland
Term
metatarsalgia
Definition
foot pain
Term
metatarsals
Definition
foot bones
Term
metrorrhagia
Definition
bleeding between menstruations
Term
microcytosis
Definition
increased numbers of smaller than normal red blood cells
Term
microglial cell
Definition
phagocytic glial cell that removes waste products from the central nervous system and protect neurons in response to inflammation
Term
microscope
Definition
instrument to view small objects
Term
microscopic description of tumors
Definition
appearance of tumors when viewed under a microscope: alveolar, carcinoma in situ, diffuse, dysplastic, epidermoid, follicular, papillary, pleomorphic, scirrhous, undifferentiated
Term
microtia
Definition
abnormally small ears
Term
micturition
Definition
urination; the act of voiding
Term
migraine
Definition
a severe headache, often unilateral, and sometimes accompanied by nausea and vomiting
Term
mineralocorticoid
Definition
steroid hormone secreted by the adrenal cortex to regulate mineral salts (electrolytes) and water balance in the body. Aldosterone is an example.
Term
miosis
Definition
contraction of the pupil of the eye
Term
miotic
Definition
drug that causes the pupil of the eye to contract
Term
mitochondria
Definition
rod-like, thread-like, or granular structures in a cell; site of catabolism and release of energy
Term
mitosis
Definition
replication of cells; a stage in a cell's life cycle involving the production of two identical cells from a parent cell
Term
mitral stenosis
Definition
narrowing of the mitral valve
Term
mitral valve
Definition
valve between the left atrium and left ventricle; bicuspid valve
Term
mitral valve prolapse (MVP)
Definition
abnormal closure of the mitral valve so the blood refluxes backward into the left atrium during ventricular contraction
Term
mitral valvulitis
Definition
inflammation of the mitral valve
Term
mixed-tissue tumors
Definition
tumors composed of different types of tissue (epithelial as well as connective tissue)
Term
modality
Definition
method of treatment, such a surgery, chemotherapy, radiation therapy, or biological therapy
Term
mohs surgery
Definition
microscopically controlled excision of skin cancers
Term
molar teeth
Definition
the sixth, seventh, and eighth teeth from the middle on either side of the dental arch
Term
molecular pharmacology
Definition
study of the interaction of drugs and their target molecules, enzymes, or cell surface receptors
Term
molecularly targeted drugs
Definition
anticancer drugs designed to block the function of growth factors, their receptors, and signaling pathways in specific tumor cells
Term
monoblast
Definition
immature monocyte
Term
monoclonal antibody
Definition
antibody produced in a laboratory to attack specific antigens
Term
monocyte
Definition
white blood cell with one large nucleus; capable of killing foreign substances by phagocytosis (ingestion)
Term
mononuclear
Definition
pertaining to a white blood cell with a single, round nucleus; monocyte or lymphocyte
Term
mononucleosis
Definition
infection disease marked by increased numbers of leukocytes and enlarged cervical lymph nodes
Term
morbidity
Definition
condition of being diseased; describing damage to normal tissues
Term
morphology
Definition
study of the shape and form of cells, particularly red blood cells
Term
motility
Definition
the power of spontaneous movement
Term
motor nerves
Definition
carry messages away from the brain and spinal cord to muscles and organs; efferent nerves
Term
mucinous
Definition
containing mucus
Term
mucoid
Definition
resembling mucus
Term
mucolytic drugs
Definition
a group of agents that liquify sputum or reduce its viscosity so it can be coughed up
Term
mucositis
Definition
inflammation of mucous membranes; often a side effect of radiation therapy or chemotherapy
Term
mucous membrane
Definition
epithelial membrane that secretes mucus and lines the tubular organs of the body
Term
mucus
Definition
sticky (viscous) substance that is secreted from a mucous membrane
Term
multigravida
Definition
a woman who has been pregnant more than once
Term
multipara
Definition
a woman who has delivered more than one viable infant
Term
multiple myeloma
Definition
malignant tumor of bone marrow; overproduction of immunoglobulins and destruction of bone tissue; (the rule that "oma" applies to benign tumors of connective tissue doesn't apply in this case)
Term
multiple sclerosis (MS)
Definition
disorder in which destruction of the myelin sheath (demyelination) of neurons in the CNS is accompanyied by replacement by plaques of sclerotic (hard) tissue
Term
murmur
Definition
extra sound heard between normal beats during auscultation of the heart
Term
muscle biopsy
Definition
removal of muscle tissue for microscopic examination
Term
muscular dystrophy
Definition
a group of inherited diseases characterized by progressive weakness and degeneration of muscle fibers without involvement of the nervous system. Most common form is Duchenne.
Term
mutagenic
Definition
pertaining to producing a mutation
Term
mutation
Definition
change in the genetic material (DNA) of a cell; may be caused by chemicals, radiation, or viruses or may occur spontaneously
Term
myalgia
Definition
muscle pain
Term
myasthenia gravis (MG)
Definition
autoimmune neuromuscular disorder characterized by weakness of voluntary muscles (attached to bones); muscles lose strength because of a failure in transmission of the nervous impulse from the nerve to the muscle cell
Term
mycosis
Definition
any disease caused by a fungus
Term
mydriasis
Definition
widening of the pupil of the eye
Term
myelin sheath
Definition
white fatty tissue that surrounds and insulates the axon of a nerve cell. Myelin speeds impulse conduction along axons.
Term
myeloblast
Definition
immature granulocytic white blood cell; a cell normally only found in the bone marrow
Term
myelogenous
Definition
pertaining to cells produced in the bone marrow
Term
myelogram
Definition
x-ray record (with contrast) of the spinal cord
Term
myelography
Definition
x-ray imaging of the spinal canal after injection of contrast medium into the subarachnoid space
Term
myeloid
Definition
derived from bone marrow
Term
myelomeningocele
Definition
congenital hernia (protrusion) of the spinal cord and meninges through a defect (gap) in the vertebral column. This defect is often associated with spina bifida.
Term
myelopoiesis
Definition
formation and development of bone marrow or cells that originate from it
Term
myelosuppression
Definition
bone marrow depression of formation of blood cells (leukopenia, anemia and thrombocytopenia)
Term
myocardial infarction
Definition
areas of dead (nectrotic) tissue in the heart muscle; heart attack
Term
myocardium
Definition
muscular layer of the heart
Term
myoma
Definition
tumor of muscle
Term
myomectomy
Definition
removal of muscle tumors (fibroids) from the uterus
Term
myometrium
Definition
muscle layer of the uterus
Term
myoneural
Definition
pertaining to muscle and nerve
Term
myopathy
Definition
disease of muscles
Term
myopia
Definition
nearsightedness; vision for near objects is better than for far
Term
myosarcoma
Definition
malignant tumor of muscle tissue, a type of flesh tumor or sarcoma
Term
myositis
Definition
inflammation of muscles
Term
myringitis
Definition
inflammation of the eardrum
Term
myringotomy
Definition
incision of the eardrum
Term
myxedema
Definition
advanced hypothyroidism in adulthood producing dull, puffy, yellow skin; course, sparse hair and prominent tongue
Term
myxoma
Definition
rare neoplasm of connective tissue found in the heart muscle
Term
narcolepsy
Definition
sudden seizures of sleep
Term
narcotic
Definition
habit-forming drug that relieves pain by producing stupor and insensibility; morphine and opium
Term
nares
Definition
passageways through the nose carrying air into the nasal cavities; nostrils
Term
nasal bone
Definition
one of two facial bones that form the nose
Term
nasal septum
Definition
wall that separates right and left cavities of the nose
Term
nasogastric intubation
Definition
insertion of a tube through the nose into the stomach
Term
nasopharyngitis
Definition
inflammation of the nasopharynx
Term
natural immunity
Definition
person's own genetic ability to fight off disease. If includes phagocytes and lymphocytes such as natural killer cells.
Term
nausea
Definition
unpleasant sensation in the stomach associated with a tendency to vomit
Term
necropsy
Definition
viewing a dead body; autopsy
Term
necrosis
Definition
condition of death of cells
Term
necrotic
Definition
pertaining to death of cells
Term
necrotic tumor
Definition
tumor that contains dead cells
Term
needle (core) biopsy
Definition
insertion of a needle into tissue to remove a core of cells to examine under a microscope; needle aspiration
Term
neonatal
Definition
pertaining to a newborn infant (up to 28 days old)
Term
neonatology
Definition
branch of medicine that studies the disorders and care of the newborn (neonate)
Term
neoplasm
Definition
new growth; benign or malignant tumors
Term
nephrectomy
Definition
removal or excision of kidney
Term
nephritis
Definition
inflammation of kidney
Term
nephrolithiasis
Definition
abnormal condition of kidney stones (renal calculi)
Term
nephrolithotomy
Definition
incision of the kidney to remove a stone
Term
nephrologist
Definition
specialist in the study of the kidneys
Term
nephrology
Definition
process of study of kidney and kidney disease
Term
nephron
Definition
combination of glomerulus and renal tubule where filtration, reabsorption, and secretion take place in the kidney
Term
nephropathy
Definition
disease or abnormality of the kidney
Term
nephroptosis
Definition
prolapse of a kidney; floating or wandering kidney
Term
nephrosclerosis
Definition
hardening of arteries and arterioles in the kidney
Term
nephrosis
Definition
abnormal condition of the kidney
Term
nephrostomy
Definition
opening of the kidney to the outside of the body
Term
nephrotic syndrome (nephrosis)
Definition
a group of clinical signs and symptoms caused by excessive protein loss in the urine
Term
nerve
Definition
macroscopic, cordlike collection of fibers (axons and dentrites) that carry electrical impulses
Term
neural
Definition
pertaining to nerves
Term
neuralgia
Definition
nerve pain
Term
neurasthenia
Definition
lack of strength in nerves; a feeling of weakness and exhaustion
Term
neuroblastoma
Definition
malignant childhood tumor originating in cells of the nervous system
Term
neurofibrillary tangles
Definition
pathological protein aggregates found within neurons in cases of Alzheimer disease
Term
neuroglia
Definition
supporting cells (stroma) of the nervous system; glial cells
Term
neurohypophysis
Definition
posterior lobe of the pituitary gland; secretes oxytocin and vasopressin
Term
neurologic
Definition
pertaining to the study of nerves
Term
neurology
Definition
process of study of nerves and nerve disorders
Term
neuron
Definition
nerve cell
Term
neuropathy
Definition
disease of nerves; primarily in the peripheral nervous system
Term
neuropile
Definition
the complex network of unmyelinated axons, dendrites, and glial branches that form the bulk of the central nervous system's grey matter and in which nerve cell bodies are embedded
Term
neurotransmitter
Definition
chemical messenger released at the end of a nerve cell. It stimulates or inhibits another cell (nerve cell, muscle cell, or gland cell)
Term
neurotripsy
Definition
to crush a nerve
Term
neutropenia
Definition
deficiency of neutrophils (polymorphonuclear leukocytes that fight disease)
Term
neutrophil
Definition
white blood cell with dark granules that stain with a neutral dye; phagocyte formed in the bone marrow and the body's first line of defense against disease
Term
neutrophilia
Definition
increased numbers of neutrophils
Term
nevus (pl. nevi)
Definition
mole (pigmented lesion of the skin)
Term
nitrates
Definition
drugs used in the treatment of angina. They dilate blood vessels, increasing blood flow and oxygen to myocardial tissue.
Term
nitrogenous waste
Definition
substance containing nitrogen and excreted in urine
Term
nitroglycerin
Definition
drug used in the treatment of angina (pectoris). It dilates coronary arteries so that more blood flows to heart muscle.
Term
nocturia
Definition
urinary frequency at night
Term
nodular goiter
Definition
enlargement of the thyroid gland due to growth of nodules (adenomas) on the thyroid gland
Term
nodule
Definition
solid, round or oval, elevated skin lesion more than 1 cm in diameter
Term
non-Hodgkin lymphoma
Definition
malignant tumor of cells (lymphocytes and large macrophages called histocytes) found in lymph nodes and spleen
Term
norepinephrine (noradrenaline)
Definition
secreted by the adrenal medulla; increases heart rate and blood pressure (sympathomimetic)
Term
normal sinus rhythm
Definition
heart rhythm originating in the sinoatrial node (pacemaker of the heart)
Term
nosocomial
Definition
pertaining to "hospital-acquired" infection or condition
Term
nuclear medicine
Definition
medical specialty that studies the uses of radioactive substances (radionuclides) in diagnosis of disease
Term
nucleic
Definition
pertaining to the nucleus
Term
nucleotide
Definition
unit of DNA (gene) composed of a sugar, phosphate and a base. The sequence or arrangement of nucleotides on a gene is the genetic code.
Term
nucleus
Definition
central, controlling structure in a cell; contains chromosomes with DNA (genetic material)
Term
nulligravida
Definition
a woman who has never been pregnant
Term
nullipara
Definition
a woman who has never given birth to an infant
Term
nyctalopia
Definition
night blindness or difficult, poor vision at night
Term
nystagmus
Definition
repetitive, rhythmic movements of one or both eyes
Term
oblique
Definition
positioned at an angle; an x-ray view
Term
obstetrics
Definition
branch of medicine concerned with pregnancy and childbirth
Term
obstructive lung disease
Definition
narrowed airways result in resistance to airflow during breathing. Examples are asthma, bronchiectasis, COPD, and cystic fibrosis.
Term
occipital bone
Definition
forms the posterior portion of the skull
Term
occlusion
Definition
blockage or closure of a vessel or tube
Term
occult
Definition
hidden
Term
odynophagia
Definition
painful swallowing
Term
olecranal
Definition
pertaining to the elbow (olecranon)
Term
olecranon
Definition
large process on the end (proximal) of the ulna; elbow
Term
oligodendroglial cell
Definition
glial cell that forms the myelin sheath covering axons. Also called oligodendrocyte.
Term
oligodendroglioma
Definition
a type of glioma that are believed to originate from the oligodendrocytes of the brain or from a glial precursor cell; they occur primarily in adults
Term
oligomenorrhea
Definition
scanty menstrual flow
Term
oligospermia
Definition
scanty (less than the normal number of sperm in semen) sperm count
Term
oliguria
Definition
scanty urination
Term
oncogene
Definition
region of DNA in tumor cells (cellular oncogene) or in viruses that cause cancer (viral oncogene). Oncogenes are designated by a three-letter word, such as abl, erb, jun, myc, ras, and src.
Term
oncologist
Definition
specialist in the study of tumors, particularly malignant growths
Term
oncology
Definition
process of study of tumors, particularly malignant growths
Term
onychomycosis
Definition
fungal infection of a nail
Term
oogenesis
Definition
formation of ova (egg cells)
Term
oophoritis
Definition
inflammation of an ovary
Term
open reduction
Definition
bone is put in proper place after incision through the skin
Term
ophthalmic
Definition
pertaining to the eye
Term
ophthalmologist
Definition
specialist in the study of the eye and eye disorders
Term
ophthalmology
Definition
study of eye and eye disorders
Term
ophthalmoplegia
Definition
paralysis of muscles that move the eyeball
Term
ophthalmoscope
Definition
instrument to visually examine the eye
Term
opioid drugs
Definition
includes all natural and synthetic derivatives of opium; morphine is the prototypical opioid and is used as an analgesic for severe and intense pain such as chronic back pain
Term
opportunistic infections
Definition
infection diseases associated with AIDS; toxoplasmosis, tuberculosis, herpes simplex, and Pneumocytosis carini pneumonia (PCP)
Term
optic chiasm
Definition
point at which optic nerve fibers cross in the brain
Term
optic disc
Definition
region at the back of the eye where the optic nerve meets the retina
Term
optic nerve
Definition
cranial nerve that carries impulses from the rod and cone cells of the rtina to the cerebral cortex in the occipital lobe of the brain
Term
optician
Definition
non-medical professional trained in grinding lenses and fitting eyeglasses
Term
optometrist
Definition
non-medical professional trained to examine and measure the eye to prescribe and fit eyeglasses and contact lenses
Term
oral
Definition
pertaining to the mouth
Term
oral administration
Definition
drugs that are given by mouth
Term
oral leukoplakia
Definition
white plaques or patches on the mucosa of the mouth
Term
orchiectomy
Definition
excision of a testis
Term
orchiopexy
Definition
surgical fixation of an undescended testis in the scrotum
Term
orchitis
Definition
inflammation of a testis
Term
orifice
Definition
an opening
Term
oropharynx
Definition
central portion of the throat, just beyond the mouth
Term
orthodontist
Definition
dentist specializing in straightening teeth
Term
orthopedics
Definition
surgical specialty devoted to straightening, correcting and treating deformities and diseases in bones
Term
orthopnea
Definition
breathing is only comfortable when a patient is in an upright position
Term
osseous tissue
Definition
bone tissue
Term
ossicle
Definition
small bone; malleus, incus, or stapes of the middle ear
Term
ossiculoplasty
Definition
surgical repair of an ossicle (small bone) of the middle ear
Term
ossification
Definition
process of forming bone through the gradual replacement of cartilage and its intercellular substance by immature bone cells (osteoblasts) and calcium deposits
Term
osteitis
Definition
inflammation of bone
Term
osteoarthritis (OA)
Definition
inflammation of bones and joints with degeneration of cartilage in the joint space
Term
osteoblast
Definition
bone cell that synthesizes collagen and protein to form bone tissue
Term
osteoclast
Definition
large bone cell that functions to absorb and remove unwanted bony tissue during growth and healing of fractures
Term
osteodystrophy
Definition
abnormal development of bone
Term
osteogenesis
Definition
formation or development of bone
Term
osteogenesis imperfecta
Definition
congenital bone disease in which bones are usually brittle and fragile
Term
osteogenic
Definition
pertaining to produced in or by bone
Term
osteogenic sarcoma
Definition
malignant (cancerous) tumor of bone tissue; osteoblasts multiply at the ends of long bones
Term
osteomalacia
Definition
softening of bones with inadequate amounts of mineral (calcium) in bone; rickets in children
Term
osteomyelitis
Definition
inflammation of bone and bone marrow secondary to infection. Bacteria enter the body through a wound and spread to bone. Treated with antibiotic therapy.
Term
osteopenia
Definition
deficiency of bone tissue caused by destruction of bone tissue that exceeds the rate of bone matrix growth
Term
osteoporosis
Definition
abnormal condition of increased loss of bony tissue; increased porosity in bone results in decreased bone density. Bones become thin, weak, brittle, and break easily.
Term
osteosarcoma
Definition
malignant tumor of bone
Term
osteotome
Definition
instrument to cut bone
Term
osteotomy
Definition
incision of a bone
Term
otalgia
Definition
ear pain
Term
otic
Definition
pertaining to the ear
Term
otolarygologist
Definition
specialist (surgeon) in ear, nose, and thoat disorders
Term
otomycosis
Definition
fungal infection of the ear
Term
otopyorrhea
Definition
discharge of pus from the ear
Term
otosclerosis
Definition
overgrowth and hardening of bony tissue in the labyrinth (inner ear)
Term
otoscopy
Definition
visual examination of the ear using an otoscope
Term
oval window
Definition
membrane between the middle and inner ears
Term
ovarian
Definition
pertaining to an ovary
Term
ovarian carcinoma
Definition
malignant tumor of the ovary (adenocarcinoma)
Term
ovarian cysts
Definition
collections of fluids within a sac (cyst) in the ovary
Term
ovarian follicle
Definition
developing sac enclosing each ovum within the ovary. Only about 400 of these sacs mature in a woman's lifetime.
Term
ovary
Definition
one of a pair of female organs (gonads) on each side of the pelvis. Ovaries are almond-shaped, about the size of large walnuts, and produce egg cells (ova) and hormones (estrogen and progesterone)
Term
ovulation
Definition
release of the ovum from the ovary
Term
ovum (pl. ova)
Definition
egg cell; female gamete
Term
oxygen
Definition
gas inhaled and entering the bloodstream through the lungs
Term
oxytocia
Definition
rapid labor and childbirth
Term
oxytocin (OT)
Definition
hormone secreted by the posterior lobe of the pituitary gland; stimulates contractions of the uterus during childbirth
Term
pacemaker (sinoatrial node)
Definition
specialized nervous tissue in the wall of the right atrium; it begins the heartbeat; sinoatrial node
Term
palate
Definition
roof of the mouth. The hard palate lies anterior to the soft palate and is supported by the upper jaw bone (maxilla).
Term
palatine tonsil
Definition
one of a pair of almond-shaped masses of lymphatic tissue at the back of the mouth (oral pharynx)
Term
palatopharyngoplasty
Definition
surgical repair to treat cases of snoring or sleep apnea causes by obstructions in the thoat or nose.
Term
palatoplasty
Definition
surgical repair of the palate, procedure to repair cleft palate and cleft lip
Term
palliative
Definition
relieving the symptoms, but not curing the illness
Term
palpebral
Definition
pertaining to an eyelid
Term
palpitations
Definition
uncomfortable sensations in the chest related to cardiac arrhythmias, such as skipped beats
Term
palsy
Definition
paralysis (partial or complete loss of motor function)
Term
pancreas
Definition
located behind the stomach. Islet (alpha and beta) cells (islets of Langerhans) secrete hormones.
Term
pancreatectomy
Definition
excision of the pancreas
Term
pancreatic
Definition
pertaining to the pancreas
Term
pancreatitis
Definition
inflammation of the pancreas
Term
pancytopenia
Definition
deficiency of all blood cells (erythrocytes, leukocytes, and platelets)
Term
panhypopituitarism
Definition
deficiency of all pituitary gland hormones
Term
papillae
Definition
small elevations on the tongue. A papilla is a nipple-like elevation.
Term
papillary
Definition
pertaining to nipple-like projections. A papillary tumor forms microscopic nipple-like or finger-like projections of cells
Term
papilledema
Definition
swelling of the optic disc; associated with increased pressure within the eye
Term
papule
Definition
small, solid elevation of the skin, less than 1 cm in diameter
Term
paracentesis
Definition
surgical puncture to remove fluid from the abdomen; abdominocentesis
Term
paralysis
Definition
destruction of nerve tissue leading to loss of sensation or motion in part of the body
Term
paranasal sinuses
Definition
one of a pair of air cavities in the bones near the nose
Term
paranephric
Definition
pertaining to beside or near a kidney
Term
paraplegia
Definition
paralysis of the lower part of the body and both legs
Term
parasympathetic nerves
Definition
involuntary autonomic nerves that regulate normal body functions such as heart rate, breathing, and muscles of the gastrointestinal tract
Term
parathyroid glands
Definition
four endocrine glands on the posterior (dorsal) region of the thyroid gland that produce parathyroid hormone (PTH) that increases blood calcium
Term
parathyroid hormone (PTH); parathormone
Definition
secreted by the parathyroid glands; increases blood calcium. Mobilizes calcium from bones into the bloodstream to increase the blood calcium for proper functioning of body tissues, especially muscles.
Term
parathyroidectomy
Definition
removal of the parathyroid glands
Term
parenchyma
Definition
tissue composed of essential and functional cells of a particular organ
Term
parenteral administration
Definition
drugs or nourishment are given intravenously (within a vein) and other than through the intestinal tract
Term
paresis
Definition
slight paralysis
Term
paresthesia
Definition
abnormal nervous sensation occurring without apparent cause. Examples are tingling, numbness or prickling sensations.
Term
parietal bones
Definition
two bones on either side of the skull
Term
parietal pleura
Definition
outer layer of the pleura lying closest to the chest wall
Term
paronychia
Definition
inflammation and swelling of the skin folds around a nail
Term
paronychium
Definition
soft tissue surrounding the nail border
Term
parotid gland
Definition
salivary gland within the cheek, just anterior to the ear
Term
paroxysmal
Definition
pertaining to a sudden occurrence
Term
paroxysmal nocturnal dyspnea
Definition
sudden attack of difficult breathing by lying down at night
Term
partial thromboplastin time
Definition
measurement of presence of plasma factors that act in a portion of the coagulation pathway
Term
parturition
Definition
act of giving birth
Term
patella
Definition
kneecap
Term
patent
Definition
open
Term
patent ductus arteriosus (PDA)
Definition
the ductus arteriosus, a small duct that is open during fetal circulation, fails to close at birth
Term
pathogenesis
Definition
development of disease
Term
pathogenic
Definition
pertaining to producing disease
Term
pathologic
Definition
pertaining to the study of disease
Term
pathologist
Definition
specialist in the study of disease
Term
pathology
Definition
process of study of disease
Term
pediatric
Definition
pertaining to the treatment of children
Term
pedunculated
Definition
possessing a stem or stalk (peduncle); characteristic of some polypoid tumors
Term
pelvic cavity
Definition
pertaining to the space surrounded by the bones of the hip region
Term
pelvic inflammatory disease (PID)
Definition
inflammation and infection of organs in the pelvic region; salpingitis, oophoritis, endometritis, endocervicitis
Term
pelvimetry
Definition
measurement of the hip bone to determine if delivery of the infant through the vagina is possible
Term
peptic ulcer
Definition
open sore or lesion of the mucous membrane of the stomach or duodenum
Term
percussion
Definition
tapping on the surface to determine the underlying structure
Term
percutaneous
Definition
pertaining to through the skin
Term
percutaneous coronary intervention (PCI)
Definition
a catheter with a balloon and stent is inserted into a coronary artery to remove collections of plaque. Drug-eluting stents release chemicals to keep debris and plaque from recollecting.
Term
perianal
Definition
pertaining to surrounding the anus
Term
periarthritis
Definition
inflammation surrounding a joint
Term
pericardial friction rub
Definition
scraping or grating sound heard on auscultation of the heart. It is usually symptomatic of pericarditis.
Term
pericardiocentesis
Definition
surgical puncture to remove fluid within the pericardial space surrounding the heart
Term
pericarditis
Definition
inflammation of the pericardium (double-layered outermost membrane of the heart)
Term
pericardium
Definition
double-layered membrane surrounding the heart
Term
perilymph
Definition
fluid contained in the labyrinth (canals of the inner ear)
Term
perineorrhaphy
Definition
suture of the perineum (following an episiotomy)
Term
perineum
Definition
in a male, the external area between the anus and scrotum. In a female, the external area between the anus and the vagina.
Term
periodontal disease
Definition
inflammation and degeneration of gums, teeth, and surrounding bone
Term
periodontal membrane
Definition
membrane that surrounds the tooth in the tooth socket
Term
periodontist
Definition
dentist specializing in treating the gums
Term
periosteum
Definition
membrane surrounding a bone
Term
peripheral nervous system
Definition
nerves outside the brain and spinal cord; cranial, spinal, and autonomic nerves
Term
peripheral vascular disease (PVD)
Definition
blockage of blood vessels outside the heart. Carotid artery occlusion is an example.
Term
peristalsis
Definition
rhythmic contractions of the tubes of the gastrointestinal (GI) tract and other tubular structures.
Term
peritoneal
Definition
pertaining to the peritoneum (membrane surrounding the abdomen)
Term
peritoneal dialysis
Definition
separation of nitrogenous wastes from the bloodstream by introducing fluid into the peritoneal cavity
Term
peritoneoscopy
Definition
process of visually examining the peritoneum and peritoneal cavity
Term
peritoneum
Definition
double-folded membrane surrounding the organs in the abdomen
Term
peritonitis
Definition
inflammation of the peritoneum
Term
perivesical
Definition
pertaining to surrounding the urinary bladder
Term
pernicious anemia
Definition
lack of mature erythrocytes caused by inability to absorb vitamin B12 into the body
Term
peroneal
Definition
pertaining to the fibula
Term
pertussis
Definition
whooping cough; bacterial infection of the throat, larynx and trachea
Term
petechia (pl. petechiae)
Definition
small, pinpoint hemorrhages in the skin
Term
phacoemulsification
Definition
lens of the eye is extracted (cataract removal) using ultrasonic vibrations
Term
phagocyte
Definition
cell that engulfs another cell or foreign organism and destroys it
Term
phalange or phalanx (pl. phalanges)
Definition
finger and toe bones
Term
phalangeal
Definition
pertaining to finger and toe bones
Term
pharmacist
Definition
specialist in preparing and dispensing drugs
Term
pharmacodynamics
Definition
study of the effects and strength of a drug within the body
Term
pharmacokinetics
Definition
study of drug concentration in body tissues over a period of time 
Term
pharmacologist
Definition
specialist in the study of the properties, uses, and actions of drugs
Term
pharmacology
Definition
study of the properties, uses, and actions of drugs
Term
pharmacy
Definition
location for preparing and dispensing drugs
Term
pharyngeal
Definition
pertaining to the pharynx or throat
Term
pharyngitis
Definition
inflammation of the pharynx
Term
pharynx
Definition
throat, the common passageway for food from the mouth and for air from the nose; (three divisions: nasopharynx, oropharynx, and laryngopharynx)
Term
phenothiazines
Definition
major tranquilizers to control severe disturbances of behavior
Term
pheochromocytoma
Definition
tumor of cells of the adrenal medulla causing hypersecretion; cells stain a dark or dusky color
Term
phimosis
Definition
narrowing of the opening of the prepuce over the glans penis
Term
phlebotomy
Definition
incision of a vein for the removal of blood
Term
phosphorus
Definition
mineral found in bones and teeth
Term
photon therapy
Definition
radiation therapy using energy in the form of x-rays or gamma rays
Term
photophobia
Definition
abnormal sensitivity to light
Term
photoselective vaporization of the prostate (GreenLight PVP)
Definition
removal of tissue to treat benign prostatic hyperplasia (BPH) using a green light laser (laser TURP)
Term
phrenic nerve
Definition
carries impulses to the diaphragm from the brain
Term
pia mater
Definition
thin, delicate inner membrane of the meninges
Term
pilonidal cyste
Definition
sac of hair in the sacral region (above the cleft in the buttocks)
Term
pilosebaceous
Definition
pertaining to hair follicles and sebaceous glands
Term
pineal gland
Definition
small endocrine gland in the center of the brain; secretes melatonin
Term
pinna
Definition
outer ear flap; auricle
Term
pituitary gland (hypophysis)
Definition
located at the base of the brain in the sella turcica; composed of an anterior lobe and a posterior lobe; secretes many hormones that stimulate growth of bones and influence other glands such as the thyroid, adrenal, and sex glands
Term
placenta
Definition
vascular organ that develops in the uterine wall during pregnancy. It serves as a communication between maternal and fetal bloodstreams.
Term
placenta previa
Definition
placental implantation over the cervical os (opening) or in the lower region of the uterine wall
Term
plantar flexion
Definition
motion that extends the foot downward toward the ground
Term
plasma
Definition
liquid portion of blood containing proteins, water, salts, nutrients, hormones, and vitamins
Term
plasma cell
Definition
B cell lymphocyte that secretes antibodies
Term
plasmapheresis
Definition
removal of plasma from withdrawn blood by centrifuge
Term
platelet
Definition
clotting cell or thrombocyte
Term
platelet count
Definition
number of platelets per cubic millimeter or microliter of blood
Term
plateletpheresis
Definition
separation of platelets from the rest of the blood
Term
pleomorphic
Definition
pertaining to a variety of shapes or cell types
Term
pleura
Definition
delicate double-folded membrane surrounding each lung
Term
pleural cavity
Definition
space between the layers of the pleura in the chest
Term
pleural effusion
Definition
collection of fluid in the pleural cavity
Term
pleural rub
Definition
scratchy sound produced by inflamed or irritated pleural surfaces rubbing against each other
Term
pleurisy
Definition
inflammation of the pleura; pleuritis
Term
pleurodynia
Definition
pain associated with the pleura
Term
plexus (pl. plexuses)
Definition
large, interlacing network of nerves including the lumbosacral, cervical, and brachial plexuses
Term
plication
Definition
stitching of folds or tucks in an organ's walls to reduce its size
Term
pneumoconiosis
Definition
abnormal condition of collection of dust particles in the lungs
Term
pneumonectomy
Definition
removal of a lung
Term
pneumonia
Definition
condition of the lungs; acute, inflammation and infection of the alveoli, which fill with pus, and products of inflammation
Term
pneumonitis
Definition
inflammation of the lungs
Term
pneumothorax
Definition
presence of air or gas in the pleural cavity causing the lung to collapse
Term
podagra
Definition
foot pain that occurs in the joint of the big toe in gout (gouty arthritis)
Term
poikilocytosis
Definition
variation in the shape of red blood cells
Term
poliomyelitis
Definition
inflammation of the gray matter of the spinal cord
Term
polyarthritis
Definition
inflammation of many joints
Term
polycystic kidney disease (PKD)
Definition
multiple fluid-filled sacs (cysts) within and on the kidney
Term
polycythemia vera
Definition
increase in numbers of red blood cells (erythremia)
Term
polydipsia
Definition
excessive thirst
Term
polymorphonuclear leukocyte
Definition
white blood cell with multi-lobe nucleus and dark-staining granules; disease fighting cell or neutrophil
Term
polymyalgia
Definition
pain of many (several) muscles, especially in the shoulders and hips
Term
polymyositis
Definition
inflammation of many muscles
Term
polyneuritis
Definition
inflammation of many nerves
Term
polyp
Definition
mushroom-like benign growth extending on a stalk from the surface of a mucous membrane
Term
polyphagia
Definition
excessive eating
Term
polypoid tumor
Definition
resembling a polyp (benign growth) that protrudes from a base
Term
polyuria
Definition
excessive urination
Term
pons
Definition
part of the brain anterior to the cerebellum and between the medulla and the rest of the midbrain. It is a bridge connecting varous parts of the brain.
Term
pore
Definition
tiny opening on the surface of the skin
Term
portal vein
Definition
large vein bringing blood to the liver from the intestines
Term
positron emission tomography (PET scan) of the heart
Definition
images show blood flow and myocardial function following uptake of radioactive substances
Term
positron emission tomography (PET)
Definition
positron-emitting radioactive substances given intravenously create a cross-sectional image of cellular metabolism based on local concentration of the radioactive substance. PET scans give information about organ function.
Term
positron emission tomography of the lung
Definition
radioactive substance is injected into a patient and the images reveal the metabolic activity in the lung for diagnosis of malignant tumors
Term
postauricular
Definition
pertaining to behind the ear
Term
posterior
Definition
pertaining to the back or dorsal side of the body or structure
Term
posteroanterior
Definition
in this position, x-ray beams pass from the back to the front of the body
Term
postictal events
Definition
refers to the state shortly after an event such as seizure, stoke, or headache
Term
postmortem
Definition
after death
Term
postpartum
Definition
after birth
Term
postprandial
Definition
after meals
Term
potassium (K+)
Definition
an electrolyte important to body processes. The kidney regulates the balance of potassium concentration within the blood.
Term
precancerous
Definition
pertaining to occurring before a malignant condition
Term
pregnancy
Definition
condition in a female of having a developing embryo and fetus in her uterus for about 40 weeks
Term
premolar teeth
Definition
the fourth and fifth teeth, before the molars
Term
prenatal
Definition
pertaining to before birth
Term
prepuce
Definition
fold of skin covering the tip of the penis. Also called foreskin.
Term
presbycusis
Definition
progressive loss of hearing, occurring in middle and older age; nerve deafness
Term
presbyopia
Definition
impairment of vision associated with middle or older age
Term
primigravida
Definition
a woman during her first pregnancy
Term
primipara
Definition
a woman who has given birth to her first child
Term
primiparous
Definition
pertaining to a woman who has given birth to her first child
Term
proctologist
Definition
specialist in the study of the anus and the rectum
Term
proctosigmoidoscopy
Definition
visual (endoscopic) examination of the anus, rectum, and sigmoid colon
Term
prodrome
Definition
symptom that appears before the onset of a more serious illness. An example of a prodrome is the fever that signals the onset of a viral illness.
Term
progesterone
Definition
hormone produced by the corpus luteum in the ovary and the placenta of pregnant women; prepares the uterus for pregnancy
Term
progestin
Definition
hormone that stimulates the uterine lining during pregnancy and is used in treatment of abnormal uterine bleeding and hormone replacement therapy
Term
prognosis
Definition
state of knowledge before the fact; prediciton of condition going forward after diagnosis
Term
prolactin (PRL)
Definition
secreated by the anterior lobe of the pituitary gland; promotes milk secretion
Term
prolapse
Definition
sliding forward or downward
Term
pronation
Definition
as applied to the hand and forearm, the act of turning the palm backward or down
Term
prone
Definition
lying in a horizontal position with face downward
Term
proptosis
Definition
forward protrusion of the eyeballs; exophthalmos
Term
prostate gland
Definition
male exocrine gland surrounding the neck of the urinary bladder and urethra. The prostate gland secretes the fluid part of semen into the urethra during ejaculation.
Term
prostatectomy
Definition
excision of the prostate gland
Term
prostatic hyperplasia (BPH)
Definition
benign growth of cells within the prostate gland
Term
prostatitis
Definition
inflammation of the prostate gland
Term
protease
Definition
enzyme that digests protein
Term
protease inhibitor (PI)
Definition
drug used to treat AIDS by blocking production of protease, an enzyme that helps HIV to reproduce
Term
protein marker test
Definition
measurements of the level of specific proteins in the blood or on the surface of tumor cells; PSA, CA-125, alpha-fetoprotein are examples
Term
prothrombin
Definition
plasma protein converted to thrombin in the clotting process
Term
prothrombin time
Definition
test of the ability of blood to clot
Term
protocol
Definition
detailed plan for treatment of an illness
Term
proton therapy
Definition
subatomic particles (protons) produced by a cyclotron deposit an absorbed dose of radiation at a finite, focused point in the body
Term
proximal
Definition
pertaining to a location near the point of attachment or beginning of an organ
Term
pruritus
Definition
itching
Term
pseudocyesis
Definition
false pregnancy
Term
psoriasis
Definition
chronic, recurrent dematosis characterized by scaly, dull red or pink patches covered by silvery gray scales
Term
psychiatrist
Definition
specialist in the study of the mind (physician)
Term
psychiatry
Definition
process of treatment of the mind by a physician specialist
Term
psychology
Definition
process of study of the mind including counseling treatment
Term
ptosis
Definition
prolapse, drooping, sagging
Term
puberty
Definition
point in the life cycle at which the ability to reproduce begins; secondary sex characteristics appear and gametes are produced
Term
pubic symphysis
Definition
area of confluence of the two pubic bones in the midline of the pelvic bone. It is a slightly movable joint separated by a disk of fibrocartilage.
Term
pubis
Definition
one of two bones forming the front portion of the hipbone
Term
pulmonary
Definition
pertaining to the lungs
Term
pulmonary
Definition
pertaining to the lungs
Term
pulmonary abscess
Definition
collection of pus in the lungs
Term
pulmonary angiography
Definition
x-ray recording of lung blood vessels after injecting contrast into the pulmonary artery
Term
pulmonary artery
Definition
blood vessel carrying oxygen-poor blood from the right ventricle of the heart to the lungs
Term
pulmonary circulation
Definition
flow of blood from the heart to the lungs and then back to the heart
Term
pulmonary edema
Definition
collection of fluid in the air sacs and bronchioles of the lung
Term
pulmonary embolism (PE)
Definition
clot or material from a distant vein that blocks a blood vessel in the lung
Term
pulmonary fibrosis
Definition
formation of scar tissue in the connective tissue of the lung
Term
pulmonary function tests (PFTs)
Definition
tests that measure the ventilation (breathing) mechanics of the lung
Term
pulmonary infarction
Definition
area of dead tissue in the lung
Term
pulmonary parenchyma
Definition
essential parts of the lungs responsible for respiration; bronchioles and alveoli
Term
pulmonary valve
Definition
a valve located between the right ventricle and the pulmonary artery
Term
pulmonary vein
Definition
one of two pairs of vessels carrying oxygenated blood from the lungs to the left atrium of the heart
Term
pulp
Definition
soft tissue within a tooth, containing nerves and blood vessels
Term
pulse
Definition
beat of the heart as felt through the walls of the arteries
Term
pupil
Definition
dark, central portion of the eye
Term
pupillary
Definition
pertaining to the pupil of the eye
Term
purgative
Definition
drug that relieves constipation and is a strong cathartic
Term
purpura
Definition
multiple pinpoint hemorrhages and accumulation of blood under the skin caused by deficiency of clotting cells (platelets); ecchymoses and petechiae
Term
purulent
Definition
forming or containing pus
Term
pustule
Definition
small elevation of the skin containing pus
Term
pyelogram
Definition
x-ray record of kidneys (renal pelvis) and urinary tract after contrast is injected (intravenously or retrograde)
Term
pyelolithotomy
Definition
incision to remove a stone from the renal pelvis of the kidney
Term
pyelonephritis
Definition
inflammation of the renal pelvis and renal medulla
Term
pyloric sphincter
Definition
ring of muscle at the end of the stomach, near the duodenum. It is normally closed, but opens when a wave of peristalsis passes over it.
Term
pyloric stenosis
Definition
narrowing of the pyloric sphincter, the opening of the stomach to the duodenum
Term
pyloroplasty
Definition
surgical repair of the pyloric sphincter
Term
pylorospasm
Definition
sudden involuntary contraction of muscles at the pyloric sphincter
Term
pylorus
Definition
distal region of the stomach, opening to the duodenum
Term
pyoderma
Definition
skin disease with formation of pus
Term
pyosalpinx
Definition
pus in a fallopian tube
Term
pyothorax
Definition
pus collection the the pleural cavity. Empyema of the chest.
Term
pyrexia
Definition
fever
Term
pyuria
Definition
pus in the urine; sign of urinary tract infection (UTI)
Term
quadriplegia
Definition
paralysis of all four limbs; both arms and both legs
Term
radial
Definition
pertaining to the radius, a bone in the lower arm (thumbside of the wrist)
Term
radiation
Definition
energy carried by a stream of particles
Term
radiculitis
Definition
inflammation of a spinal nerve root
Term
radiculopathy
Definition
disease of a spinal nerve root
Term
radiocurable tumor
Definition
tumor cells that are destroyed by radiation therapy
Term
radiofrequency catheter ablation (RFA)
Definition
to treat certain cardiac arrhythmias, radiofrequency energy is delivered from the tip of a catheter inserted through a blood vessel into the heart. The treatment destroys or ablates the tissue causing the arrhythmia.
Term
radiographer
Definition
one who assists a radiologist in performing diagnostic x-ray procedures
Term
radioimmunoassay
Definition
test combines radioactive chemicals and antibodies to detect minute quantities of substances in a patient's blood
Term
radioisotope
Definition
radioactive form of an element substance; radionuclide
Term
radiology
Definition
medical specialty concerned with the study of x-rays and their use in the diagnosis of disease; includes other forms of energy, such as ultrasound and magnetic waves. Also called diagnostic radiology.
Term
radiolucent
Definition
permitting the passage of x-rays. Radiolucent structures appear black on x-ray film.
Term
radionuclide
Definition
radioactive form of an element that gives off energy in the form of radiation; radioisotope
Term
radionuclide scans
Definition
radioactive substances (radionuclides) are injected intravenously and scans (images) are taken of organs
Term
radiopaque
Definition
obstructing the passage of x-rays. Radiopaque structures appear white on the x-ray film.
Term
radiopharmaceutical
Definition
radioactive drug (radionuclide plus chemical) that is administered safely for diagnostic and therapeutic purposes
Term
radioresistant tumor
Definition
tumor cells that require large doses of radiation to be destroyed
Term
radiosensitive tumor
Definition
tumor in which radiation can cause the death of cells without serious damage to surrounding tissue
Term
radiosensitizers
Definition
drugs that increase the sensitivity of tumors to x-rays
Term
radiotherapy
Definition
treatment using radiation, high-energy x-rays or other radiation sources
Term
radius
Definition
one of two bones in the lower arm (connecting to the wrist on the thumb side)
Term
rale
Definition
abnormal, fine, crackling sound heard on auscultation when there is fluid in the alveoli
Term
reabsorption
Definition
in this process, the renal tubules return materials necessary to the body back into the bloodstream
Term
receptor (chemical)
Definition
target substance with which a drug interacts in the body; cellular or nuclear protein that binds to a hormone so that a response can be elicited
Term
receptor (nervous system
Definition
organ that receives a nervous stimulation and passes it on to nerves within the body. The skin, ears, eyes, and taste buds are receptors.
Term
recombinant DNA
Definition
insertion of a gene (region of DNA) from an organism into the DNA of another organism
Term
rectal administration
Definition
drugs are inserted through the anus into the rectum
Term
rectocele
Definition
hernia of the wall of the rectum
Term
rectum
Definition
last section of the large intestine, connecting the end of the colon and the anus
Term
recumbent
Definition
lying down (prone or supine)
Term
red blood cell count
Definition
number of erythrocytes per cubic millimeter or microliter of blood
Term
red blood cell morphology
Definition
microscopic examination of a stained blood smear to determine the shape of individual red blood cells
Term
red bone marrow (matter)
Definition
soft bone tissue in spongy, cancellous bone; site of hematopoiesis (blood cell formation and development)
Term
reduction
Definition
reconnection of a bone to its normal postion after a fracture
Term
refraction
Definition
bending of light rays by the cornea, lens, and fluids of the eye to bring light rays into focus on the retina
Term
relapse
Definition
recurrence of symptoms or decline after apparent recovery
Term
remission
Definition
partial or complete disappearance of symptoms of disease
Term
renal
Definition
pertaining to the kidney
Term
renal angiography
Definition
x-ray examination (with contrast) of the vascular system (blood vessels) of the kidney
Term
renal angioplasty
Definition
dilation of narrowed areas in renal arteries via surgical repair
Term
renal artery
Definition
blood vessel that carries blood to the kidney
Term
renal biopsy
Definition
removal of kidney tissue for microscopic examination by a pathologist
Term
renal cell carcinoma (hypernephroma)
Definition
cancerous tumor of the kidney in adulthood
Term
renal colic
Definition
intermittent, severe pain spasms resulting from stones (calculi) in a ureter or in the kidney (renal pelvis)
Term
renal failure
Definition
failure of the kidney to excrete wastes and maintain its filtration function
Term
renal hypertension
Definition
high blood pressure resulting from kidney disease
Term
renal ischemia
Definition
condition in which blood is held back from the kidney, often by blockage of renal arteries and arterioles
Term
renal transplantation
Definition
surgical transfer of a complete kidney from a donor to a recipient
Term
renal tubule
Definition
microscopic tube in the kidney in which urine is formed after filtration. In the renal tubule, the composition of urine is altered by the processes of reabsorption and secretion.
Term
renal vein
Definition
blood vessel that carries blood away from the kidney and toward the heart
Term
renin
Definition
an enzymatic hormone synthesized, stored, and secreted by the kidney; it raises blood pressure by influencing vasoconstriction
Term
resection
Definition
process of excision or removal of an organ or part of the body
Term
respiration
Definition
exchange of gasses (oxygen and carbon dioxide) at the lung capillaries (external respiration) and at the tissue capillaries (internal respiration). Respiration is the cycle of inspiration and expiration.
Term
respiratory distress syndrome
Definition
abnormal condition in infants when a protein (surfactant) is missing in the lung tissues. Infants have difficult respiratory function; hyaline membrane disease.
Term
respiratory drug
Definition
treats asthma, emphysema, and infections that affect breathing; bronchodilators are respiratory drugs
Term
restrictive lung disease
Definition
a condition in which lung expansion is limited by diseases that affect the chest wall, pleura or lung tissue itself. Examples are pulmonary fibrosis, radiation damage, and pneumoconiosis
Term
reticulocyte
Definition
immature erythrocyte with a network of strands (reticulum)
Term
retina
Definition
sensitive nerve cell layer of the eye
Term
retinal detachment
Definition
separation of the two layers of the retina from each other
Term
retinitis pigmentosa
Definition
inflammation of the retina with pigmentation and progressive scarring of tissue
Term
retinoblastoma
Definition
malignant tumor of the retina of the eye; childhood malignancy
Term
retrocardiac
Definition
pertaining to behind the heart
Term
retroflexion
Definition
bending backward
Term
retrograde pyelogram (RP)
Definition
x-ray imaging of the kidneys, ureters, and bladder after injection of contrast through a urinary catheter into the ureters
Term
retroperitoneal
Definition
pertaining to behind the peritoneum (membrane surrounding the abdominal cavity)
Term
retroversion
Definition
tipping backward of an organ or a part of the body; as in the uterus
Term
retrovirus
Definition
virus that makes copies of itself using the host cell's DNA, a process that is the reverse of the normal replication mechanism in cells. HIV is a retrovirus.
Term
reverse transcriptase inhibitor
Definition
drug used to treat AIDS by blocking an enzyme (reverse transcriptase), needed to make copies of HIV.
Term
rhabdomyoma
Definition
benign tumor of striated, voluntary muscle (attached to bones)
Term
rhabdomyosarcoma
Definition
malignant tumor of striated, voluntary muscle
Term
rheumatic heart disease
Definition
heart disease caused by rheumatic fever
Term
rheumatoid arthritis (RA)
Definition
chronic inflammatory and painful disease of joints; caused by autoimmune reaction against joint tissues (synovial membrane)
Term
rheumatoid factor test
Definition
serum (blood minus clotting proteins and cells) is tested for the presence of an antibody found in patients with rheumatoid arthritis
Term
rheumatologist
Definition
medical doctor specializing in diagnosis and treatment of joint disorders
Term
rhinitis
Definition
inflammation of the nose
Term
rhinoplasty
Definition
surgical repair of the nose
Term
rhinorrhea
Definition
discharge of mucus from the nose
Term
rhonchus (pl. rhonchi)
Definition
loud, rumbling sound heard on auscultation of bronchi that are obstructed by sputum
Term
rhytidectomy
Definition
plastic surgery to remove wrinkles and other signs of aging
Term
ribonucleic acid (RNA)
Definition
cellular substance that, along with DNA, plays an important role in protein synthesis
Term
ribs
Definition
twelve pairs of curved, elongated bones in the chest
Term
right lymphatic duct
Definition
receives lymph from the right side of the body and empties lymph into a vein in the neck
Term
rigidity
Definition
generalized hypertonicity of the muscles. Increased resistance on passive motion in any direction due to steady contraction of flexors and extensors.
Term
rod
Definition
photoreceptor retinal cell; essential for seeing objects in low light and for peripheral vision
Term
roentgenology
Definition
study of x-rays; radiology
Term
rotation
Definition
circular movement around an axis (central point)
Term
rubella
Definition
exanthemous viral disease; German measles
Term
rubeola
Definition
exanthemous viral disease; measles
Term
rugae
Definition
ridges on the hard palate and the wall of the stomach
Term
sacral
Definition
pertaining to the sacrum
Term
sacral vertebrae
Definition
bones of the sacrum (lower back below the lumbar region)
Term
sacrum
Definition
large, triangular bone below the lumbar vertebrae at the dorsal part of the pelvis
Term
sagittal plane
Definition
vertical plane that divides the body into a right and left portion
Term
saliva
Definition
digestive juice produced by salivary glands
Term
salivary glands
Definition
parotid, sublingual, and submandibular glands that produce saliva (a digestive juice)
Term
salpingectomy
Definition
excision of a fallopian tube
Term
salpingitis
Definition
inflammation of a fallopian tube
Term
salpingopharyngeal
Definition
pertaining to the eustachian tube and the throat
Term
sarcoidosis
Definition
chronic inflammatory disease of unknown cause in which small nodules or tubercles develop in lungs, lymph nodes, and other organs
Term
sarcoma
Definition
malignant tumor of flesh or connective tissue such as bone, muscle, fat, and cartilage
Term
scabies
Definition
contagious, parasitic infection of the skin with intense pruritus
Term
scan
Definition
image of an area, organ or tissue of the body obtained from ultrasound, radioactive tracer studies, computed tomography, or magnetic resonance imaging
Term
scapula
Definition
shoulder blade
Term
scapular
Definition
pertaining to the shoulder blade
Term
sciatic nerve
Definition
nerve extending from the base of the spine down the thigh, lower leg, and foot
Term
sciatica
Definition
pain or inflammation radiating down the leg along the sciatic nerve
Term
scirrhous
Definition
pertaining to hard, densely packed tumors, overgrown with fibrous tissue
Term
sclera
Definition
white portion of the eyeball
Term
scleral buckle
Definition
procedure to suture a band of silicone on the sclera directly over a detached portion of the retina
Term
scleritis
Definition
inflammation of the sclera
Term
scleroderma
Definition
chronic and progressive disease of the skin with hardening and shrinking of connective tissue
Term
scoliosis
Definition
abnormal condition of lateral (sideways) curvature of the spine
Term
scotoma
Definition
blind spot in the field of vision
Term
scrotum
Definition
external sac that contains the testes
Term
sebaceous cyst
Definition
sac-like cavity filled with a collection of yellowish, cheesy sebum and epithelial debris
Term
sebaceous gland
Definition
oil gland in the dermis layer of the skin
Term
seborrhea
Definition
condition marked by excessive secretion from sebaceous blands
Term
seborrheic dermatitis
Definition
inflammation of the skin with excessive secretion from sebaceous glands; dandruff
Term
sebum
Definition
oily secretion from sebaceous glands in the skin
Term
sedative
Definition
mild sleep inducing agent that relaxes a patient without necessarily producing sleep
Term
sella turcica
Definition
depression in the sphenoid bone at the base of the skull; location of the pituitary gland
Term
semen
Definition
spermatozoa (sperm cells) and seminal fluid (prostatic and other glandular secretions)
Term
semen analysis
Definition
ejaculated fluid is examined microscopically
Term
semicircular canals
Definition
passageways in the inner ear that are associated with maintaining equilibrium
Term
seminal vesicle
Definition
either of paired sac-like male exocrine glands that secrete a fluid into the vas deferens. The seminal fluid is the major component of semen.
Term
seminiferous tubules
Definition
narrow, coiled tubules that produce sperm in the testes
Term
seminoma
Definition
malignant tumor within a testis
Term
senile plaques
Definition
extracellular deposits of amyloid in the gray matter of the brain characteristic of Alzheimer disease
Term
sensory nerves
Definition
carry messages to the brain and spinal cord from a receptor; afferent nerves
Term
septal defects
Definition
small holes, present at birth, in the walls between the heart chambers
Term
septum (pl. septa)
Definition
wall or partition. The interatrial septum lies between the atria of the heart and the interventricular septum is between the ventricles of the heart.
Term
serous
Definition
pertaining to a thin, watery fluid (serum)
Term
serous otitis media
Definition
non-infectious inflammation of the middle ear with accumulation of clear fluid
Term
serum
Definition
plasma minus clotting proteins (prothrombin and fibrinogen) and clotting cells
Term
serum calcium
Definition
measurement of calcium in serum
Term
serum creatine kinase
Definition
measurement of an enzyme (creatine) in serum; increased levels occur in muscular dystrophy, polymyositis, and traumatic injuries
Term
serum enzyme tests
Definition
chemicals measure in the blood as evidence of a heart attack. Examples are creatine kinase (CK), troponin-I (cTnI), and troponin T (cTnT).
Term
sessile
Definition
having no stem; characteristic of some polypoid tumors
Term
sex hormones
Definition
steroids (androgens and estrogens) produced by the adrenal cortex to influence male and female sexual characteristics
Term
shingles
Definition
viral (herpes zoster) illness that affects peripheral nerves; produces blisters and pain on the skin overlying the path of peripheral nerves
Term
shunt
Definition
to divert; passage to divert flow from one route to another
Term
sialadenectomy
Definition
removal (excision) of a salivary gland
Term
sialadenitis
Definition
inflammation of a salivary gland
Term
sialolith
Definition
salivary gland stone; lodged in a salivary gland or duct
Term
sickle cell anemia
Definition
hereditary condition marked by abnormal sickle shape of erythrocytes and by hemolysis
Term
side effect
Definition
adverse effect that routinely results from the use of a drug
Term
sideropenia
Definition
deficiency of iron in the blood
Term
sigmoid colon
Definition
fourth and last S-shaped segment of the colon, just before the rectum; empties into the rectum
Term
sigmoidoscopy
Definition
visual endoscopic examination of the sigmoid colon
Term
silicosis
Definition
silica glass dust collects in the lungs; a type of pneumoconiosis
Term
simulation
Definition
study using CT scan or MRI to map treatment before RT is given
Term
single photon emission computed tomography (SPECT)
Definition
radioactive tracer is injected intravenously and a computer reconstructs a 3D image based on a composite of many views
Term
sinoatrial node
Definition
sensitive nervous tissue in the wall of the right atrium; pacemaker of the heart
Term
sinus
Definition
hollow, air cavity within a bone
Term
sinusitis
Definition
inflammation of paranasal sinuses
Term
skin biopsy
Definition
procedure to remove a suspected malignant lesion and send it to pathology laboratory for microscopic examination
Term
skin test
Definition
reaction of the body to a substance by observing the results of injecting the substance intrademally or applying it topically to the skin
Term
sleep apnea
Definition
sudden cessation of breathing during sleep
Term
slit-lamp microscopy
Definition
examination of ocular (eye) structures using a slit lamp and microscope
Term
sodium (Na+)
Definition
an electrolyte regulated in the blood and urine by the kidneys
Term
solid tumor
Definition
tumor composed of a mass of cells
Term
sonogram
Definition
image of sound waves as they bounce off organs in the body; echogram or ultrasound image
Term
spasm
Definition
sudden, involuntary contraction of muscles
Term
spasticity
Definition
increased resistance to sudden passive movements. After the initial resistance, there may be muscle relaxation (clasp knife phenomenon).
Term
spermatogenesis
Definition
formation of sperm cells
Term
spermatozoon (pl. spermatozoa)
Definition
sperm cell
Term
spermolytic
Definition
pertaining to destruction of sperm cells
Term
sphenoid bone
Definition
bat-shaped bone that forms part of the base of the skull
Term
spherocytosis
Definition
increase in numbers of sphere-shaped red blood cells, as in hemolytic anemia
Term
sphincter
Definition
circular ring of muscle that constricts a passage or closes a natural opening
Term
sphygmomanometer
Definition
instrument to measure blood pressure
Term
spina bifida
Definition
congenital defects in the lumbar spinal column caused by imperfect union of vertebral parts (neural tube defect)
Term
spina bifida cystica
Definition
a cyst protrudes through the defect in the vertebral arch. These conditions can be diagnosed in utero on the basis of elevated levels of alpha-fetoprotein after amniocentesis and by ultrasound imaging.
Term
spina bifida occulta
Definition
in occulta, the outer part of some of the vertebrae are not completely closed. The split in the vertebrae is so small that the spinal cord does not protrude.
Term
spinal cavity
Definition
space surrounded by the backbones or spine
Term
spinal column
Definition
series of backbones (vertebrae) located on the posterior side of the body
Term
spinal cord
Definition
the nervous tissue within the spinal cavity
Term
spinal nerves
Definition
thirty-one pairs of nerves arising from the spinal cord. Each spinal nerve affects a particular area of the skin.
Term
spinal stenosis
Definition
narrowing of the neural canal or nerve root canals in the lumbar spine
Term
spirometer
Definition
an instrument to measure breathing
Term
spleen
Definition
organ adjacent to the stomach (in the LUQ) that produces, stores, and eliminates blood cells
Term
splenectomy
Definition
removal of the spleen
Term
splenic flexure
Definition
downward bend of the colon on the left side of the body toward the descending colon
Term
splenomegaly
Definition
enlargement of the spleen
Term
spondylolisthesis
Definition
forward slipping or subluxation of one vertebra over another
Term
spondylosis
Definition
abnormal condition of the spine characterized by stiffness and fixation of vertebral joints
Term
sprain
Definition
trauma to a joint with pain, swelling, and injury to ligaments
Term
sputum
Definition
material expelled from the chest by coughing or by clearing the throat; phlegm
Term
sputum culture
Definition
sputum is collected and placed in a growth medium to analyze the type of microorganisms that may be present
Term
squamous cell carcinoma
Definition
skin cancer that develops from squamous epithelium
Term
squamous epithelium
Definition
flat, scale-like layer of cells in the epidermis or outer layer of the skin
Term
staging of tumors
Definition
system of evaluating the extent of spread of tumors. An example is the TNM system (tumor-node-metastasis).
Term
stapedectomy
Definition
removal of the stapes (third middle ear bone)
Term
stapes
Definition
small, stirrup-shaped bone in the middle ear; third ossicle
Term
staphylococci
Definition
berry or spherical shapped bacteria in cluster formation
Term
stasis
Definition
stop, control
Term
statins
Definition
cholesterol-lowering drugs that control hypercholesterolemia in the blood
Term
steatoma
Definition
collection of sebum in a cyst or sac-like formation
Term
steatorrhea
Definition
fat in the feces; frothy, foul-smelling fecal matter
Term
stem cell
Definition
unspecialized cell that gives rise to all forms of specialized cells in the body. Hematopoietic stem cells are found in the bone marrow and lead to the development of all types of blood cells.
Term
stem cell transplant
Definition
stem cells (immature blood cells) are harvested from the bloodstream of a patient and then reinfused after the patient has received chemotherapy
Term
stenosis
Definition
tightening, stricture, narrowing
Term
stereotactic radiosurgery
Definition
does of radiation delivered under stereotactic (highly precise) guidance (gamma knife surgery)
Term
sterilization
Definition
any procedure that removes an individual's ability to produce or release reproductive cells
Term
sternum
Definition
breast bone
Term
steroid
Definition
complex substance related to fats, and of which many hormones are made. Examples are estrogens, androgens, glucocorticoids, and mineralocorticoids.
Term
steroid drugs
Definition
inhaled or given intravenously and orally to reduce chronic inflammation in respiratory passageways
Term
steroids (cancer therapy)
Definition
complex, naturally occurring chemicals, such as hormones, that are used in cancer chemotherapy
Term
stethoscope
Definition
instrument for listening to sounds in the chest
Term
stimulant
Definition
drug that excites and promotes activity
Term
stimulus (pl. stimuli)
Definition
agent of change (light, sound, touch) in the internal or external environment that evokes a response
Term
stomach
Definition
muscular organ that receives food from the esophagus. The stomach's parts are the fundus (proximal section), body (middle section), and antrum (distal section).
Term
stomach parts
Definition
lower esophageal (cardiac) sphincter, fundus, body, rugae, antrum, pylorus, pyloric sphincter
Term
stomatitis
Definition
inflammation of the mouth
Term
stool culture
Definition
test for microorganisms present in feces
Term
stool guaiac (Hemoccult test)
Definition
detection of occult (hidden) blood in feces. Important screening test for colon cancer.
Term
strabismus
Definition
abnormal deviation of the pupils; esotropia or exotropia are examples
Term
straight catheter
Definition
a short, simple piece of flexible tube is used (not indwelling). Used for intermittent catheterization or self-catheterization.
Term
strain
Definition
muscle injury involving overstretching of muscle with pain and swelling
Term
stratified
Definition
arranged in layers
Term
stratum (pl. strata)
Definition
a layer
Term
stratum corneum
Definition
outermost layer of the epidermis, consisting of flattened, keratinized cells
Term
streptococcus
Definition
berry or spherical shapped bacterium in twisted chain formation
Term
stress incontinence
Definition
loss of bladder control occurs with strain on the bladder opening during coughing or sneezing
Term
stress test (exercise tolerance test ETT)
Definition
used to determine the heart's response to physical exertion
Term
striated (skeletal) muscle
Definition
composed of bands of fibers that make the muscle look striped (striated); attached to bones (voluntary or skeletal muscle)
Term
stricture
Definition
abnormal narrowing of an opening passageway
Term
stridor
Definition
strained, high-pitched noisy breathing associated with obstruction of the larynx or trachea
Term
stroma
Definition
supportive, connective tissue of an organ, as distinguished from its parenchym. Glial cells are the stromal tissue of the brain.
Term
styloid process
Definition
pole-like process extending downward from the temporal bone on each side of the skull
Term
subcostal
Definition
pertaining to under the ribs
Term
subcutaneous
Definition
pertaining to under the skin
Term
subcutaneous layer
Definition
pertaining to the third layer of the skin, under the epidermis and dermis (cutaneous layers). The subcutaneous layer contains fatty tissue.
Term
subdural hematoma
Definition
collection of blood in the space below the dura mater surrounding the brain
Term
subhepatic
Definition
pertaining to below the liver
Term
sublingual
Definition
pertaining to under the tongue
Term
subluxation
Definition
partial or incomplete dislocation of a bone from its joint
Term
submandibular
Definition
pertaining to under the lower jaw (mandible)
Term
subpatellar
Definition
pertaining to under the knee cap
Term
subungual
Definition
pertaining to under a nail
Term
sulcus (pl. sulci)
Definition
depression or groove in the surface of the cerebral cortex; fissure
Term
superficial
Definition
pertaining to on the surface of the body
Term
supination
Definition
as applied to the hand and forearm, the act of turning the palm forward or up
Term
supine
Definition
lying horizontally on the back with face upward
Term
suppressor T cell
Definition
lymphocyte that inhibits the activity of B and T cell lymphocytes
Term
suppurative otitis media
Definition
infectious inflammation of the middle ear with pus formation
Term
supraclavicular
Definition
pertaining to above the clavicle (collar bone)
Term
suprapubic
Definition
pertaining to above the pubic bones
Term
suprapubic catheter
Definition
indwelling catheter is inserted through the lower abdominal wall into the bladder
Term
surgical procedures to treat cancer
Definition
methods of removing cancerous tissue: cryosurgery, cauterization, en bloc resection, excisional biopsy, exenteration, fulguration, incisional biopsy
Term
suture
Definition
to unite by stitching; also, the stitch used to unite
Term
suture joint
Definition
immovable, fibrous joint, as between bones of the skull
Term
symbiosis
Definition
close association between organisms of different species or a state in which two people are emotionally dependent on each other
Term
symmetry
Definition
equality of parts; literally, measured together
Term
sympathetic nerves
Definition
autonomic nerves that influence bodily functions involuntarily in times of stress
Term
sympathomimetic
Definition
pertaining to mimicking or copying the effect of the sympathetic nervous system
Term
symphysis
Definition
bones that grow together separated by a piece of fibrocartilage. The pubic symphysis of the pelvis is an example.
Term
synapse
Definition
space through which a nervous impulse is transmitted from one neuron to another or from a neuron to another cell, such as a muscle or gland cell
Term
syncopal
Definition
pertaining to syncope (fainting)
Term
syncope
Definition
fainting; temporary loss of consciousness
Term
syndactyly
Definition
fusion of fingers or toes; a congenital anomaly
Term
syndrome
Definition
group of symptoms that occur together indicating a particular condition or disorder
Term
syndrome of inappropriate ADH (SIADH)
Definition
excessive secretion of antidiuretic hormone (ADH, vasopressin) leading to water retention
Term
synergism
Definition
drug action in which the combination of two drugs causes an effect that is greater than the sum of the individual effects of each drug
Term
synergistic
Definition
pertaining to synergism
Term
synovial cavity
Definition
space between bones at a synovial joint. It contains synovial fluid.
Term
synovial fluid
Definition
sticky (viscous) fluid within the joint space (synovial cavity)
Term
synovial joint
Definition
freely movable joint
Term
synovial membrane
Definition
membrane lining the synovial joint cavity; produces synovial fluid
Term
synovitis
Definition
inflammation of the synovial membrane lining the synovial joint
Term
synthesis
Definition
combination of simple substances to create something new and more complex
Term
syphilis
Definition
(STD) chronic STD caused by a spirochete
Term
syringe
Definition
instrument for introducing or withdrawing fluids from the body
Term
systemic circulation
Definition
flow of blood from body tissues to the heart and from the heart back to the tissues
Term
systemic lupus erythematosus (SLE)
Definition
chronic inflammatory autoimmune disease of collagen involving joints, skin, kidneys, blood vessels and other organs; affects connective tissue in tendons, ligaments, bones and cartilage all over the body. Marked by a reddish (erythematous) facial rash.
Term
systole
Definition
contraction phase of the heartbeat
Term
tachycardia
Definition
rapid heartbeat
Term
tachypnea
Definition
excessively rapid and shallow breathing
Term
tagging
Definition
attaching a radionuclide to a chemical and following its path in the body
Term
talipes
Definition
club foot; foot is fixed in an abnormal position due to a congenital deformity of the ankle and foot
Term
target tissue
Definition
cells of an organ that are affected or stimulated by specific hormones
Term
tarsals
Definition
ankle bones
Term
tarsectomy
Definition
removal of an anklebone
Term
technetium Tc-99m sestamibi scan
Definition
uptake of a radioactive chemical in myocardium reveals evidence of a heart attach (myocardial infarction)
Term
telemetry
Definition
continuous monitoring of a patient's heart rhythm in a hospital
Term
teletherapy
Definition
radiation delivered to a tumor from a distant source, such as a linear accelerator or cyclotron
Term
temporal bones
Definition
two bones on each side of the skull near the ear
Term
temporomandibular joint
Definition
connection between the temporal bone of the skull and the mandibular bone of the jaw (lower jaw bone)
Term
tendinitis
Definition
inflammation of tendons; tendonitis
Term
tendon
Definition
a type of connective tissue that binds muscles to bones
Term
tenorrhaphy
Definition
suture of a tendon
Term
tenosynovitis
Definition
inflammation of a tendon and its sheath or covering
Term
teratoma
Definition
malignant tumor of a testis or ovary; composed of embryonic cells that develop into different types of tissue
Term
testicular
Definition
pertaining to a testis or testicle
Term
testicular torsion
Definition
twisting of the spermatic cord
Term
testis (Pl. testes)
Definition
male gonad (testicle) that produces spermatozoa and the hormone testosterone; two glands enclosed in the scrotal sac of a male
Term
testosterone
Definition
hormone secreted by the interstitial tissue of the testes; responsible for male sex characteristics
Term
tetany
Definition
constant muscle contraction resulting from hypoparathyroidism
Term
tetraiodothyronine (T4)
Definition
hormone secreted by the thyroid gland that increases cellular metabolism; thyroxine
Term
tetralogy of Fallot
Definition
four separate defects of the heart occurring at birth
Term
thalamic
Definition
pertaining to the thalamus
Term
thalamus
Definition
main relay center of the brain. It conducts impulses between the spinal cord and the cerebrum; incoming sensory messages are relayed through the thalamus to appropriate centers in the cerebrum.
Term
thalassemia
Definition
inherited defect in the ability to produce hemoglobin, usually seen in persons of Mediterranean background
Term
thallium 201 scan
Definition
concentration of a radioactive substance (thallium 201) is measured in the myocardium to show evidence of an infarction ("cold spots")
Term
therapeutic
Definition
pertaining to treatment or therapy
Term
thoracentesis
Definition
surgical puncture to remove fluid from the chest (pleural space)
Term
thoracic
Definition
pertaining to the chest
Term
thoracic cavity
Definition
the space in the chest surrounded by the ribs, spinal column, breastbone, diaphragm, and chest wall muscles
Term
thoracic duct
Definition
large lymphatic vessel in the upper chest
Term
thoracic vertebrae
Definition
twelve backbones in the region of the chest (T1-T12)
Term
thoracoscopy
Definition
endoscopic visual examination of the chest
Term
thoracotomy
Definition
process of cutting into the chest; incision of the chest
Term
thrill
Definition
fine vibration felt on palpation (touching) the body over a blood vessel that is blocked
Term
thrombin
Definition
enzyme necessary for blood clotting (converts fibrinogen to fibrin in the clotting process)
Term
thrombocyte
Definition
blood clotting cell (platelet)
Term
thrombocytopenia
Definition
deficiency of clotting cells
Term
thrombolysis
Definition
destruction of a clot
Term
thrombolytic therapy
Definition
injection of drugs (streptokinase and tPA) to dissolve clots in the bloodstream
Term
thrombophlebitiis
Definition
inflammation of a vein associated with formation of a thrombus or clot
Term
thrombosis
Definition
abnormal condition of clot formation in a blood vessel
Term
thrombotic occlusion
Definition
blockage of a blood vessel caused by thrombosis or clot formation
Term
thrombotic stroke
Definition
a thrombus (blood clot) usually forms around atherosclerotic plaques. Since blockage of the artery is gradual, onset of symptomatic thrombotic strokes is slower.
Term
thymectomy
Definition
removal of the thymus gland (a lymphocyte-producing gland in the chest); used as treatment for myasthenia gravis
Term
thymoma
Definition
malignant tumor of the thymus gland
Term
thymus gland
Definition
lymphoid organ in the mediastinum that produces T cell lymphocytes and aids in the immune response
Term
thyroid carcinoma
Definition
malignant tumor of the thyroid gland
Term
thyroid function tests
Definition
measurement of thyroxine, triiodothyronine, and thyroid-stimulating hormone in the bloodsteam
Term
thyroid gland
Definition
endocrine gland that surrounds the trachea in the neck that secretes the hormone thyroxine (T4)
Term
thyroid hormone
Definition
secretion from the thyroid gland that stimulates cellular metabolism
Term
thyroid scan
Definition
an iodine 131 radionuclide is administered intravenously, and an image of the size and shape of the thyroid gland is obtained by scanning
Term
thyroid-stimulating hormone (TSH); thyrotropin
Definition
hormone secreted by the anterior lobe of the pituitary gland; stimulates the thyroid gland to secrete its hormones
Term
thyroiditis
Definition
inflammation of the thyroid gland
Term
thyrotoxicosis
Definition
hyperthyroidism (overactivity of the thyroid gland). Graves disease is an example.
Term
tibia
Definition
larger of the two lower leg bones
Term
tibial
Definition
pertaining to the larger of the two lower leg bones
Term
tic
Definition
involuntary movement of a small group of muscles, as of the face; characteristic of Tourette syndrome
Term
tinea
Definition
fungal infection of the skin; tinea corporis (ringworm) and tinea pedis (athlete's foot) are examples
Term
tinnitus
Definition
ringing, buzzing or roaring sound in the ear
Term
tolerance
Definition
drug action in which larger and larger does must be given to achieve a desired effect
Term
tomography
Definition
process of taking a series of images to show an organ in layers or depth
Term
tonic-clonic seizure (grand mal seizure)
Definition
major (grand mal) convulsive seizure marked by sudden loss of consciousness, stiffening of muscles, and twitching and jerking movements
Term
tonometry
Definition
measurement of tension and pressure within the eye; glaucoma test
Term
tonsillectomy
Definition
removal of the tonsils
Term
tonsillitis
Definition
inflammation of tonsils
Term
tonsils
Definition
masses of lymphatic tissue on either side of the back of the mouth
Term
topical application
Definition
drugs are applied locally on the skin or mucous membranes of the body; ointments, lotions, and creams are examples
Term
toxic
Definition
pertaining to a toxin, which is a poison or harmful substance
Term
toxicity
Definition
harmful effect of a drug
Term
toxicology
Definition
branch of pharmacology that studies harmful chemicals and their effects on the body
Term
trabeculae
Definition
supporting bundles of fibers in cancellous, spongy (soft) bone
Term
tracer studies
Definition
radionuclides are used as tags, or labels, attached to chemicals and followed as they travel through the body
Term
trachea
Definition
tube leading from the throat to the bronchial tubes. Also called windpipe.
Term
tracheal
Definition
pertaining to the trachea
Term
tracheal stenosis
Definition
narrowing of the trachea
Term
tracheostomy
Definition
new opening of the trachea to the outside of the body
Term
tracheostomy
Definition
new opening of the trachea to the outside of the body
Term
tracheotomy
Definition
incision of the trachea
Term
tranquilizer
Definition
drug that controls anxiety and severe disturbances of behavior
Term
transducer
Definition
handheld device that sends and receives ultrasound signals
Term
transesophageal echocardiogram (TEE)
Definition
probe is passed down the esophagus. Clearer pictures of the heart are obtained because lungs and bones of the chest do not obscure images.
Term
transfusion
Definition
literally, to pour across; transference of blood from one person to another
Term
transhepatic
Definition
pertaining to through or across the liver
Term
transient ischemic attack (TIA)
Definition
transient ischemic attack; symptoms from a CVA that are considered temporary as they are there for a day or so then go away versus residuals that stay forever with the patient
Term
transport
Definition
movement of a drug across a cell membrane into body cells
Term
transthoracic echocardiogram (TTE)
Definition
views of the heart are obtained by moving the transducer to different locations on the chest or abdominal wall
Term
transurethral
Definition
pertaining to across or through the urethra
Term
transurethral resection of the prostate (TURP)
Definition
excision of benign prostatic hyperplasia using a resectoscope through the urethra
Term
transverse plane
Definition
horizontal plane running across the body parallel to the ground that divides the body into upper and lower portions. Also called cross-sectional or axial.
Term
tremor
Definition
involuntary movements resulting from the contraction of opposing muscle groups, producing rhythmic or alternating movements
Term
trichomycosis
Definition
fungal infection of hair, especially in the area under the arm (axilla)
Term
tricuspid valve
Definition
a valve located between the right atrium and right ventricle
Term
trigeminal neuralgia
Definition
flashes of stab-like pain along the course of a branch of the trigeminal nerve (5th cranial nerve). The trigeminal nerve has branches to the eye, upper jaw and lower jaw.
Term
triglycerides
Definition
large fat molecules composed of three parts fatty acid and one part glycerol
Term
trigone
Definition
triangular area in the urinary bladder in which the ureters enter and the urethra exits
Term
trigonitis
Definition
inflammation of the trigone of the urinary bladder
Term
triiodothyronine (T3)
Definition
hormone secreted by the thyroid gland (contains three atoms of iodine); stimulates cellular metabolism
Term
trochanter
Definition
large process at the neck of the femur (thigh bone)
Term
tubal ligation
Definition
blocking the fallopian tubes to prevent fertilization from occurring (sterilization procedure)
Term
tube thoracostomy
Definition
chest tube is passed through an opening in the skin of the chest to continuously drain a pleural effusion
Term
tubercle
Definition
rounded process on many bones for attachment of muscles and tendons
Term
tuberculin test
Definition
determines past or present exposure to tuberculosis based on a positve skin test (PPD, tine, and Mantoux tests)
Term
tuberculosis
Definition
infectious disease caused by Mycobacterium tuberculosis. Lungs are usually involved but other organs may be affected.
Term
tuberosity
Definition
small, rounded process on a bone
Term
tuning fork tests
Definition
measure bone and air conduction of sound through the ear
Term
turbid
Definition
cloudy in appearance
Term
tympanic membrane
Definition
membrane between the outer and middle ear; eardrum
Term
tympanoplasty
Definition
surgical repair of the eardrum
Term
ulcer
Definition
open sore on the skin or mucous membranes of the body
Term
ulcerating tumor
Definition
growth that has open, exposed surfaces resulting from death of overlying tissue
Term
ulcerative colitis
Definition
chronic inflammation of the colon with presence of ulcers; a form of inflammatory bowel disease (IBD)
Term
ulna
Definition
one of two bones in the lower arm; connects to the wrist on the little finger side
Term
ulnar
Definition
pertaining to the ulna
Term
ultrasonography (US, U/S)
Definition
diagnostic technique that projects and retrieves high-frequency sound waves as they echo off parts of the body
Term
umbilical region
Definition
region of the navel or umbilicus, located between the right and left lumbar regions. Located below the epigastric region and above the hypogastric region.
Term
unilateral
Definition
pertaining to one side
Term
upper gastrointestinal series
Definition
x-ray images of the esophagus, stomach, and small intestine obtained after administering barium by mouth
Term
uptake
Definition
rate of absorption of a radionuclide into an organ or tissue
Term
urea
Definition
major nitrogenous waste product excreted in urine
Term
uremia
Definition
excessive amount of urea and other nitrogenous wastes in the blood
Term
ureter
Definition
one of two tubes, each leading from a single kidney to the urinary bladder
Term
ureteroileostomy
Definition
new opening of the ureters to an isolated portion of the ileum that has been removed from its normal location and connected to the outside of the body.
Term
ureterolithotomy
Definition
incision of a ureter for removal of a stone
Term
ureteroneocystostomy
Definition
surgical transplantation of a ureter to a new site in the urinary bladder. This occurs with a kidney transplant.
Term
ureteroplasty
Definition
surgical repair of a ureter
Term
urethra
Definition
tube leading from the urinary bladder to the outside of the body
Term
urethral stricture
Definition
narrowing of the urethra
Term
urethritis
Definition
inflammation of the urethra
Term
urethroplasty
Definition
surgical repair of the urethra
Term
urgency incontinence
Definition
loss of bladder control occurs with inability to hold back urination when feeling the urge to void
Term
uric acid
Definition
an acidic nitrogenous waste excreted in the urine
Term
uric acid test
Definition
measurement of uric acid in serum; high levels are associated with gouty arthritis
Term
urinary bladder
Definition
hollow muscular sac that holds and stores urine
Term
urinary catheterization
Definition
tube is inserted through the urethra and into the bladder to drain urine or to inject dy or other solutions
Term
urinary incontinence
Definition
involuntary passage of urine
Term
urinary retention
Definition
inability to pass urine, which is held back in the urinary bladder
Term
urination
Definition
process of expelling urine; also called micturition
Term
urniary microalbumin test
Definition
measures small quatities of albumin in urine as a marker of diabetic nephropathy
Term
urography
Definition
process of taking x-ray images of the urinary tract after injecting contrast
Term
urology
Definition
process of study of urinary tract / male reproductive system
Term
urticaria
Definition
acute allergic reaction in which red, round, elevated swollen areas called wheals appear on the skin. Pruritus may be intense.
Term
uterine prolapse
Definition
tipping forward of the uterus
Term
uterine serosa
Definition
outermost layer surrounding the uterus
Term
uterus
Definition
muscular organ in a female that nourishes the developing embryo during pregnancy and from which menstruation occurs; womb
Term
uveitis
Definition
inflammation of the uvea, which is the vascular layer of the eye (including the iris, choroids, and ciliary body)
Term
uvula
Definition
soft tissue hanging from the middle of the soft palate
Term
uvulectomy
Definition
removal (excision) of the uvula
Term
vaccination
Definition
introduction of a vaccine (containing dead or weakened antigen) to produce immunity. It is a type of acquired immunity.
Term
vaccine
Definition
weakened or dead antigen is administered to induce production of antibodies resulting in immunity
Term
vagal
Definition
pertaining to the vagus nerve
Term
vagina
Definition
muscular, mucosa-lined canal extending from the uterus to the exterior of the body
Term
vaginal orifice
Definition
opening of the vagina to the exterior of the body
Term
vaginitis
Definition
inflammation of the vagina
Term
vagus nerve
Definition
tenth cranial nerve; its branches reach to the larynx, trachea, bronchi, lungs, aorta, esophagus, and stomach. Unlike the other cranial nerves, the vagus leaves the head and "wanders" into the abdominal and thoracic cavities.
Term
valve
Definition
structure in a vein or in the heart that temporarily closes an opening so that flood flows in the proper direction
Term
valvotomy
Definition
incision of a valve
Term
valvuloplasty
Definition
surgical repair of a valve
Term
varicella
Definition
exanthamous viral disease marked by itchy red rach that develops into blisters and pustules and then scabs; chicken pox
Term
varicocele
Definition
enlarged, dilated veins near the testicle
Term
varicose veins
Definition
swollen, twisted veins, often occurring in the legs
Term
vas deferens
Definition
narrow tube (one on each side) that carries sperm from the epididymis into the body and toward the urethra. Also called ductus deferens.
Term
vascular
Definition
pertaining to a blood vessel
Term
vasectomy
Definition
bilateral surgical removal of a part of the vas deferens
Term
vasoconstriction
Definition
narrowing of a blood vessel
Term
vasoconstrictor
Definition
drug that narrows blood vessels
Term
vasodilation
Definition
widening of a blood vessel; vasodilatation
Term
vasodilator
Definition
drug that widens blood vessels
Term
vasovasostomy
Definition
new opening (anastomosis) of the ends of a severed vas deferens. This surgical procedure reverses a vasectomy.
Term
vegetations
Definition
collections of clotted material that accumulates on endocardium and valves of the heart in conditions such as endocarditis and rheumatic heart disease
Term
vein
Definition
thin-walled blood vessel that carries oxygen-poor (deoxygenated) blood from body tissues back to the heart
Term
vena cava (pl. venae cavae)
Definition
largest vein in the body. The venae cavae (inferior and superior) return blood to the heart from the body tissues.
Term
venipuncture
Definition
incision of a vein to remove blood
Term
venous
Definition
pertaining to a vein
Term
ventilation-perfusion scan (V/Q scan)
Definition
a detection device records radioactivity after an injection of a radioisotope or inhalation of small amount of radioactive gas
Term
ventilation-perfusion studies
Definition
radiopharmaceutical is inhaled (ventilation) and injected intravenously (perfusion) followed by imaging its passage through the respiratory tract
Term
ventral
Definition
pertaining to the front or anterior of the body
Term
ventricle
Definition
one of two lower chambers of the heart
Term
ventricles of the brain
Definition
canals in the brain that contain cerebrospinal fluid
Term
venule
Definition
a small vein
Term
venule
Definition
small vein
Term
verruca (pl. verrucae)
Definition
small benign growth (wart) in the skin; caused by a virus
Term
verrucous tumor
Definition
tumor, whose growth pattern, resembles a wart
Term
vertebra
Definition
a bone of the spinal column, backbone
Term
vertebra (pl. vertebrae)
Definition
a backbone
Term
vertebrae
Definition
two or more backbones
Term
vertebral
Definition
pertaining to the backbone
Term
vertigo
Definition
abnormal sensation of moving in space or having objects move about you in space
Term
vesicle
Definition
small blister, containing clear fluid, on the skin
Term
vesicoureteral reflux
Definition
backflow of urine from the urinary bladder to the ureters
Term
vestibule
Definition
central cavity of the labyrinth, connecting the cochlea and semicircular canals
Term
vestibulocochlear
Definition
pertaining to the vestibule and cochlea
Term
vicera
Definition
internal organs. Singular form is viscus.
Term
villi
Definition
microscopic projections in the wall of the small intestine that absorb nutrients into the bloodstream. Singular form is villus.
Term
viral hepatitis
Definition
inflammation of the liver caused by a virus
Term
viral load test
Definition
measures the amount of HIV in the blood stream
Term
viral oncogenes
Definition
pieces of DNA from viruses that infect a normal cell and cause it to become malignant
Term
virus
Definition
an infectious agent that reproduces by entering a host cell and using the host's genetic material to make copies of itself
Term
visceral
Definition
pertaining to internal organs
Term
visceral (smooth) muscle
Definition
muscle that lines the walls of internal organs; smooth or involuntary muscle
Term
visceral pleura
Definition
innermost membrane of the pleura, lying closest to the lung tissue itself
Term
visual acuity test
Definition
measurement of clearness of vision; assessed by reading letters of decreasing size on an eye chart
Term
visual field test
Definition
measurement of the area in front of the eye in any part of which an object is seen without moving the eye
Term
vitamin
Definition
substance found in foods and essential in small quantities for growth and good health
Term
vitiligo
Definition
patches of white, unpigmented skin surrounded by areas of normal skin; leukoderma
Term
vitrectomy
Definition
removal of vitreous humor
Term
vitreous humor
Definition
soft, jelly-like material that fills the inner vitreous chamber of the eye
Term
voiding
Definition
emptying of urine from the urinary bladder; urination or micturition
Term
voiding cystourethrogram (VCUG)
Definition
x-ray record (with contrast) of the urinary bladder and urethra obtained while the patient is voiding urine
Term
volvulus
Definition
transmitted by blood transfusions or needle inoculation.
Term
vomer
Definition
thin plate of bone that forms part of the nasal septum, which is the wall separating the nostrils
Term
vulva
Definition
external female genitalia; includes the labia, hymen, clitoris, and vaginal orifice
Term
vulvovaginitis
Definition
inflammation of the vulva and vagina
Term
wasting syndrome
Definition
weight loss and decrease in muscle strength, appetite, and mental activity that occurs with AIDS
Term
western blot
Definition
specific test to detect presence of anti-HIV antibodies in the bloodstream
Term
wheal
Definition
round elevation in the skin with a pale, whitish area surrounded by redness; hives
Term
wheeze
Definition
continuous high-pitched whistling sound heard when air is forced through a narrow space during inspiration or expiration
Term
white blood cell (WBC) differential
Definition
percentage of the total white blood cell count made up by different types of leukocytes
Term
white blood cell count
Definition
number of leukocytes per cubic millimeter or microliter of blood
Term
xanthoma
Definition
soft, yellowish, round nodule found on the eyelids; xanthelasma
Term
xeroderma
Definition
dry skin
Term
xerophthalmia
Definition
condition of excessive dryness of the eye
Term
xerostomia
Definition
dryness of the mouth
Term
xiphoid process
Definition
lower, narrow portion of the sternum (breastbone)
Term
yellow bone marrow (matter)
Definition
fatty tissue in the shaft of long bones
Term
zygomatic bones
Definition
cheekbones of the face
Term
zygote
Definition
fertilized egg cell
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