| OLB | olfactory bulb; open liver biopsy; open lung biopsy |
|---|---|
| RT | radiologic technologist; radiotelemetry; radiotherapy; radium therapy; rapid tranquilization; reacti... |
| RU | radioulnar; rat unit; reading unit; residual urine; resin uptake; resistance unit; retrograde urogra... |
| SRD | service-related disability; Society for the Relief of Distress; Society for the Right to Die; sodium... |
| URF | unidentified reading frame; uterine relaxing factor |