Category: Aa-Ab

1. Alert and oriented.2. American Association of Ophthalmology, a professional organization.3. American Academy of Otolaryngology, a professional organization.4. American Association of Orthodontists, a professional organization.5. Amino acid oxidase, an enzyme.

The synbol for the enzyme arylalkylamine N-acetyltransferase and for the gene that encodes it. AANAT is present in animals, bacteria and yeast but in no other living organisms. AANAT belongs to the large superfamily of acetyltransferase enzymes. AANAT is used to make melatonin, a hormone that regulates the body’s cycles of sleeping and waking.

Founded in 1876 and based in Washington, D.C., the Association of American Medical Colleges (AAMC) is a not-for-profit association representing all 136 accredited U.S. and 17 accredited Canadian medical schools; nearly 400 major teaching hospitals and health systems, including 62 Department of Veterans Affairs medical centers; and 93 academic and scientific societies. Through these institutions…

The AAFP is a professional society for American family doctors.

American Association of Dermatology, one of many important professional societies in the health arena. The AMA (the American Medical Association) is a better known example in the US.

Spoken of as the “triple-AS”, the American Association for the Advancement of Science is an organization concerned not only with the biomedical sciences but with all of the sciences. The AAAS publishes the weekly journal “Science”, one of the great scientific periodicals. “Science” carries a remarkable range of new scientific information including, for example, findings…

Abdominal Aortic Aneurysm

Abbreviation on a prescription meaning before meals; from the Latin “ante cibum”, before meals. This is one of a number of abbreviations of Latin terms that have traditionally been used in writing prescriptions.

Ataxia telangiectasia (A-T) is rare genetic disease that affects the nervous system, the immune system, and many other parts of the body. Also known as Louis-Bar syndrome, dilated blood vessels and poor coordination are typical hallmarks of the condition. Small clusters of enlarged blood vessels called telangiectases can occur in the eyes and on the surface of the skin.…

Prefix indicating the absence or depletion of something: for example, aphagia (not eating) or aphonia (voiceless). The related prefix an- is usually used before a vowel, as in anemia (without blood) and anoxia (without oxygen).