| IRBBB | incomplete right bundle branch block |
|---|---|
| IRBC | immature or infected red blood cell |
| IRBP | intestinal retinol-binding protein |
| IRC | International Red Cross |
| IRC | inspiratory reserve capacity; instantaneous resonance curve; International Red Cross; International Research Communications System |
| IRCA | intravascular red cell aggregation |
| IRCC | International Red Cross Committee |
| IRCU | intensive respiratory care unit |
| IRD | infantile Refsum syndrome; isorhythmic dissociation |
| IRDP | insulin-related DNA polymorphism |