| OPL | other party liability; outer plexiform layer; ovine placental lactogen |
|---|---|
| OSF | organ system failure; osteoclast-stimulating factor; outer spiral fiber; overgrowth stimulating fact... |
| OW | once weekly; open wedge; outer wall; oval window |
| POMP | phase-offset multiplanar [pulse sequence in magnetic resonance imaging]; principal outer material pr... |
| ROS | reactive oxygen species; review of systems; rod outer segment |