| 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 |
| MMIH | megacystis-microcolon-intestinal hypoperistalsis [syndrome] |
| MMIHS | megacystis-microcolon-intestinal hypoperistalsis syndrome |