| Acronym | Definition |
|---|
| IRRT➣International Relations Round Table (est. 1949; American Library Association) |
| IRRT➣Intermittent Renal Replacement Therapy |
| IRRT➣International Regulatory Review Team |
| IRRT➣Independent Readiness Review Team |
| IRRT➣Industrial Relations Research Trust (Dublin, Ireland) |
| IRRT➣Intel Rapid Recovery Technology |