| OSF | organ system failure; osteoclast-stimulating factor; outer spiral fiber; overgrowth stimulating fact... |
|---|---|
| OULQ | outer upper left quadrant |
| OURQ | outer upper right quadrant |
| OW | once weekly; open wedge; outer wall; oval window |
| POMP | phase-offset multiplanar [pulse sequence in magnetic resonance imaging]; principal outer material pr... |