| Abbreviation | Definition |
|---|---|
| RI | Randomly Initialized |
| RI | Randomly Inversed |
| RI | Rate Information |
| RI | Raw Indication |
| RI | Read Intensive |
| RI | Reference Intake |
| RI | Referral Interviews |
| RI | Refractive Index |
| RI | Regina Imperatrix |
| RI | Related Injury |
| RI | Relative Intensity |
| RI | Relative Inverse |
| RI | Remote Influencing |
| RI | Render Interface |
| RI | Renderman Interface |
| RI | Repec Index |
| RI | Reporting Information |
| RI | Repubblica Italiana |
| RI | resistive index |
| RI | Retention Index |