| IOD | injured on duty; integrated optical density; interorbital distance |
|---|---|
| IPD | idiopathic Parkinson disease; idiopathic protracted diarrhea; immediate pigment darkening; increase ... |
| ISD | immunosuppressive drug; Information Services Division; inhibited sexual desire; interstimulus distan... |
| ISP | distance between iliac spines; interspace; intraspinal; isoproterenol |
| OC | obstetrical conjugate; occlusocervical; office call; on call; only child; optic chiasma; oral contra... |