| OW | once weekly; open wedge; outer wall; oval window |
|---|---|
| RW | radiological warfare; ragweed; respiratory work; Romano-Ward [syndrome]; round window |
| SPW | subxiphoid pericardial window |
| CTZ | chemoreceptor trigger zone; chlorothiazide |
| PTR | patellar tendon reflex; patient termination record; patient to return; peripheral total resistance; ... |