| Int | international; intestinal |
|---|---|
| Intest | intestine, intestinal |
| IO | incisal opening; inferior oblique; inferior olive; internal os; interorbital; intestinal obstruction... |
| IP | icterus praecox; imaging plate; immune precipitate; immunoblastic plasma; immunoperoxidase technique... |
| IRBP | intestinal retinol-binding protein |