| PRO-PBP | pro-platelet basic protein |
|---|---|
| ORS | olfactory reference syndrome; oral rehydration solution; oral surgery, oral surgeon; Orthopaedic Res... |
| CAGE | cut down, annoyed by criticism, guilty about drinking, eye-opener drinks (a test for alcoholism) |
| OCP | octacalcium phosphate; ocular cicatricial pemphigoid; oral case presentation; oral contraceptive pil... |
| OET | oral endotracheal tube; oral esophageal tube |