sort by Rank | Alpha
| Possible Meanings | Rank |
| Instant Runnoff Voting | *** |
| Imaging Robotics Virtual | *** |
| Inter Range Vector | *** |
| Inversed Ratio Ventilation | ** |
| Incident Response Vehicle | ** |
| idiopathic retinal vasculitis | ** |
| Infarct related vessel | ** |
| infarct-related vessel | ** |
| inferior retinacular vein | ** |
| inspiratory residual volume | ** |
| Interactive Remote Visualization | ** |
| Isolated retinal vasculitis | ** |
| isolated rhombencephalic ventricle | ** |
| PCV-inverse ratio ventilation | ** |
| I:E ratio ventilation | ** |
| inspiratory-to-expiratory ratio ventilation | ** |
| Inter Range Vectors | ** |
| Interrupt Request Vector | ** |
| Immediate Response Vehicles | ** |
| Instance Runoff Voting | ** |
| Integral Remote Viewing | ** |
| Infra Red Vision | ** |
| Initial Repeat Value | * |
| Injury Related Visits | * |
| Inoue Rubber Vietnam | * |
| Illinois River Valley | * |
| Insulated Reentry Vehicle | * |
| Information Regarding Various | * |