| FIUO | for internal use only |
|---|---|
| GIM | general internal medicine; gonadotropin-inhibiting material |
| IAC | image analysis cytometry; ineffective airway clearance; internal auditory canal; interposed abdomina... |
| IAD | inactivating dose; instructional advance directive; internal absorbed dose |
| IAM | Institute of Applied Microbiology [Japan]; Institute of Aviation Medicine; internal auditory meatus |