| IR | drop of voltage across a resistor produced by a current; ileal resection; immune response; immunizat... |
|---|---|
| IS | ileal segment; immediate sensitivity; immune serum; immunosuppression; impingement syndrome; incenti... |
| RILT | rabbit ileal loop test |
| Ao | orifice area |
| AVO | aortic valve opening; aortic valve orifice; atrioventricular opening |