| Abbreviation | Definition |
|---|---|
| ALS | afferent loop syndrome |
| ALS | air leak syndrome |
| ALS | angiotensin-like substance |
| ALSG | Advanced Life Support Group |
| ALSOB | Alcohol-like substance on breath |
| ALT | Alanine Transaminase |
| AM | alternative medicine |
| AM | alveolar macrophage |
| AM | ambulatory monitoring |
| AM | amikacin |
| AM | amlodipine |
| AM | amniotic membrane |
| AM | amoxicillin |
| AM | ampicillin |
| AM | amplitude |
| AM | amygdala |
| AM | anovulatory menstruation |
| AM | ante meridiem before noon |
| AM | anteromedial |
| AM | antimalarial |