| RFA | resident functional atlas; right femoral artery; right frontoanterior [fetal position] |
|---|---|
| RMO | Regional Medical Officer; Resident Medical Officer |
| ROC | receiver operating characteristic; receptor-operated channels; relative operating characteristic; re... |
| RSO | radiation safety officer; Resident Surgical Officer; right superior oblique [muscle] |
| SMR | senior medical resident; sensorimotor rhythm; severe mental retardation; sexual maturity rating; ske... |