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| A steroid hormone and the most potent naturally occurring androgen that is formed by the interstitial cells of the testes, and possibly by the ovary and adrenal cortex, may be produced in nonglandular tissues from precursors such as androstenedione, and is used in the treatment of hypogonadism, cryptorchism, carcinomas, and menorrhagia. |
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| A form of arthritis, occurring mainly in older persons, that is characterized by chronic degeneration of the cartilage of the joints. Also called degenerative joint disease, hypertrophic arthritis, osteoarthrosis. |
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| Acne is a common skin disease characterized by pimples on the face, chest, and back. It occurs when the pores of the skin become clogged with oil, dead skin cells, and bacteria |
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| An antiviral drug that is available under the trade name Zovirax, in oral, intravenous, and topical forms. The drug blocks the replication of the varicella zoster virus. |
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| AddictionAddiction is a persistent, compulsive dependence on a behavior or substance. The term has been partially replaced by the word dependence for substance abuse. Addiction has been extended, however, to include mood-altering behaviors or activities. Some researchers speak of two types of addictions: substance addictions (for example, alcoholism, drug abuse, and smoking); and process addictions (for example, gambling, spending, shopping, eating, and sexual activity). There is a growing recognition that many addicts, such as polydrug abusers, are addicted to more than one substance or process. |
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| Alcoholism or alcohol dependence is defined by the American Medical Association (AMA) as "a primary, chronic disease with genetic, psychosocial, and environmental factors influencing its development and manifestations." |
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| a mucinous substance obtained from the leaves of the plant, Aloe vera. Various therapeutic properties are claimed, including antibacterial, antifungal and anti-inflammatory activity. It is often used on burns |
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