| AMRA | American Medical Record Association |
|---|---|
| ADA | adenosine deaminase; American Dental Association; American Dermatological Association; American Diab... |
| AGA | accelerated growth area; allergic granulomatosis and angiitis; American Gastroenterological Associat... |
| AOA | American Osteopathic Association; Administration on Aging; Alpha Omega Alpha Honor Society; American... |
| ANSWER | Agency for Toxic Substances and Disease Registry/National Library of Medicine's Workstation for Emer... |