| Acronym | Definition |
|---|
| IDRI➣Infectious Disease Research Institute (Seattle, WA) |
| IDRI➣International Drawing Research Institute (various locations) |
| IDRI➣Institut Diplomatique et de Relations Internationales (French) |
| IDRI➣Intensity-Dependent Refractive Index (physics) |
| IDRI➣International Dendrological Research Institute (Wellesley, MA) |