| IR | drop of voltage across a resistor produced by a current; ileal resection; immune response; immunizat... |
|---|---|
| IRC | inspiratory reserve capacity; instantaneous resonance curve; International Red Cross; International ... |
| IRV | inferior radicular vein; inspiratory reserve volume; inverse ratio ventilation |
| MCR | Medical Corps Reserve; melanocortin receptor; message competition ratio; metabolic clearance rate; m... |
| MNR | marrow neutrophil reserve |