| AAHE | Association for the Advancement of Health Education |
|---|---|
| AAHP | American Association of Health Plans |
| AAHPER | American Association for Health, Physical Education, and Recreation |
| AAHS | American Association for Hand Surgery |
| AAHSLD | Association of Academic Health Sciences Library Directors |
| AAI | acute alveolar injury; Adolescent Alienation Index; American Association of Immunologists; atrial inhibited [pacemaker] |
| AAIB | alpha-1-aminoisobutyrate |
| AAID | American Academy of Implant Dentures |
| AAIN | American Association of Industrial Nurses |
| AAK | allo-activated killer |