| AOA | American Osteopathic Association; Administration on Aging; Alpha Omega Alpha Honor Society; American... |
|---|---|
| AAA | abdominal aortic aneurysm/aneurysmectomy; acne-associated arthritis; acquired aplastic anemia; acute... |
| ABP | actin-binding protein; ambulatory blood pressure; American Board of Pedodontics; American Board of P... |
| ACCP | American College of Chest Physicians; American College of Clinical Pharmacology; American College of... |
| ACS | acrocallosal syndrome; acrocephalosyndactyly; acute chest syndrome; acute confusional state; Alcon C... |