| OCBF | outer cortical blood flow |
|---|---|
| OEE | osmotic erythrocyte enrichment; outer enamel epithelium |
| OHC | occupational health center; outer hair cell |
| O-I | outer and inner |
| OM | obtuse mental; occipitomental; occupational medicine; ocular movement; oculomotor; Osborne Mendel [r... |