| Acronym | Definition |
|---|
| ICRU➣International Commission on Radiation Units and Measurements |
| ICRU➣Iowa Center for Research by Undergraduates (University of Iowa; Iowa City, Iowa) |
| ICRU➣Irish Colleges Rugby Union |
| ICRU➣Iceland’s Crisis Response Unit |
| ICRU➣International Crocodile Rescue Unit (Australia Zoo) |