| OBGS | obstetrical and gynecological surgery |
|---|---|
| OBGY | Obstetrics and gynecology |
| obj | objective |
| obl | oblique |
| OBP | odorant-binding protein; ova, blood, parasites [in stool] |
| OBRA | Omnibus Reconciliation Act |
| OBS | obesity; obstetrical service; organic brain syndrome |
| Obs | observation, observed; obstetrics, obstetrician |
| obs | obsolete |
| OBS(?) | Organic Brain Syndrome |