| AID | acquired immunodeficiency disease; acute infectious disease; acute ionization detector; Agency for I... |
|---|---|
| AIM | Abridged Index Medicus; acute transverse myelopathy; area of interest magnification; artificial inte... |
| AI/RHEUM | artificial intelligence rheumatology consultant system |
| AK | above knee; acetate kinase; adenosine kinase; adenylate kinase; artificial kidney |
| ALEC | artificial lung-expanding compound |