| 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 |
| C1 | first cervical nerve; first cervical vertebra; first component of complement |
| C2 | second cervical nerve; second cervical vertebra; second component of complement |