| AOA | American Osteopathic Association; Administration on Aging; Alpha Omega Alpha Honor Society; American... |
|---|---|
| ACP | accessory conduction pathway; acid phosphatase; acyl carrier protein; American College of Pathologis... |
| AMA | against medical advice; alkaline membrane assay; American Management Association; American Medical A... |
| ANA | acetylneuraminic acid; American Narcolepsy Association; American Neurological Association; American ... |
| ASHA | American School Health Association; American Social Health Association; American Speech and Hearing ... |