| OR | 1) Operating Room; 수술실 2) Open Reduction |
|---|---|
| OR | a logical binary relation that is true if any argument is true, and false otherwise; [o]estrogen receptor; odds ratio; oil retention [enema]; open reduction; operating room; optic radiation; oral rehydration; orosomucoid; orthopedic; orthopedic research |
| OR | rate of outflow |
| Or | orbitale |
| OR&F | open reduction and fixation |
| ORA | opiate receptor agonist |
| ORALABX | oral antibiotics |
| ORANS | Oak Ridge Analytical System |
| ORBC | ox red blood cell |
| ORC | oculo-reno-cerebellar [syndrome] |