| FIUO | for internal use only |
|---|---|
| GIM | general internal medicine; gonadotropin-inhibiting material |
| IA | ibotenic acid; immune adherence; immunoadsorbent; immunobiologic activity; impedance angle; indolami... |
| IAC | image analysis cytometry; ineffective airway clearance; internal auditory canal; interposed abdomina... |
| IAD | inactivating dose; instructional advance directive; internal absorbed dose |