| ROC | receiver operating characteristic; receptor-operated channels; relative operating characteristic; re... |
|---|---|
| RRF | residual renal function |
| RU | radioulnar; rat unit; reading unit; residual urine; resin uptake; resistance unit; retrograde urogra... |
| SRS | schizophrenic residual state; sex reassignment surgery; Silver-Russell syndrome; simple repeat seque... |
| TR | recovery time; rectal temperature; repetition time; residual tuberculin; terminal repeat; tetrazoliu... |