| RFT | respiratory function test; rod-and-frame test; right frontotransverse [fetal position] |
|---|---|
| ROESY | rotating frame Overhauser effect spectroscopy |
| SCRF | surface coil rotating frame |
| short-FRAME | short stature-facial anomalies-Rieger anomaly-midline anomalies-enamel defects [syndrome] |
| URF | unidentified reading frame; uterine relaxing factor |