TIRF
| Acronym | Definition |
|---|---|
| TIRF | Transmucosal Immediate-Release Fentanyl (medicine) |
| TIRF | Traffic Injury Research Foundation |
| TIRF | The International Research Foundation for English Language Education (Ann Arbor, MI) |
| TIRF | Total Internal Reflection Fluorescent (microscopy) |
| TIRF | Total Internal Reflectance Fluorimetry (biomedical technology) |
| TIRF | Transmittal/Information Request Form (US NASA) |
| TIRF | The Indian Rafting Foundation |