| OM | outer medulla |
|---|---|
| OMB | of Management and Budget |
| omb | optomotor blind |
| OMC | Open mitral comissurotomy |
| OMC | Outer Membrane Complex |
| OMCD | Outer medullary collecting duct |
| OMCDi | outer medullary collecting duct |
| OMD | Oromandibular dystonia |
| OMDVR | Outer medullary descending vasa recta |
| OME | Omeprazole |