| Abbreviation | Definition |
|---|---|
| AD | anti-diarrhoeal |
| AD | antigenic determinant |
| AD | anxiety disorder |
| AD | Aortic Disection |
| AD | aortic dissection |
| AD | arginine deaminase |
| AD | arrhythmic death |
| AD | arrythmogenic dose |
| AD | arterial distensibility |
| AD | Asperger disease |
| AD | assistive device |
| AD | atherogenic diet |
| AD | atopic dermatitis |
| AD | atopic disease |
| AD | auris dextra???right ear |
| AD | auris dextraright ear |
| AD | auris dextra–right ear |
| AD | autistic disorder |
| AD | autoimmune disease |
| AD | autonomic dysfunction |