IARR
| Acronym | Definition |
|---|---|
| IARR | International Association for Relationship Research (biennial conference) |
| IARR | International Association for Radiation Research |
| IARR | Interagency Resource Representative |
| IARR | Internal Average Relative Reflectance |
| IARR | Interim Agreed-upon Rate Recommendation |
| IARR | Indirect Antiglobulin Rosetting Reaction |