| A-mode | amplitude mode; amplitude modulation |
|---|---|
| M-mode | motion mode |
| AA | abdominal aorta; acetic acid; achievement age; active alcoholic; active assistive [range of motion];... |
| AAROM | active assertive range of motion; active-assisted range of motion |
| AS | acetylstrophanthidin; acidified serum; acoustic schwannoma; acoustic stimulation; active sarcoidosis... |