@

at

+

plus or minus

<

less than

>

greater than

<

less than or equal to

>

greater than or equal to

=

equal

Δ

change

∑

total/sum

µ

micro

≈ (or one line)

almost equal to (almost)

°

degree

1°

primary

2°

secondary

3°

tertiary

α

alpha

a-

without

A 1 C

hemoglobin A1C for diabetes

a a

each

a.c.   or    ac

before meals

a.m.

morning

a.m.a.

against medical advice

ABC

aspiration, biopsy, cytology

or

airway, breathing, circulation

abd

abdominal

ABG

arterial blood gas

acl

anterior cruciate ligament

before meals