IRSB
| Acronym | Definition |
|---|---|
| IRSB | Intravenous Regional Sympathetic Block |
| IRSB | Italian Rolling Street Battle (Milan, Italy) |
| IRSB | Immunization Registry Support Branch (National Immunization Program; US CDC) |
| IRSB | Incident Response to Suicide Bombing |
| IRSB | Interim Retention Storage Basins |
| IRSB | Intraline Resources Sdn. Bhd. (Malaysia) |