| 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 |