| RBA | relative binding affinity; rescue breathing apparatus; right basilar artery; right brachial artery; ... |
|---|---|
| RCA | red cell agglutination; relative chemotactic activity; renal cell carcinoma; right carotid artery; r... |
| RCC | radiological control center; rape crisis center; ratio of cost to charges; receptor-chemoeffector co... |
| RE | radium emanation; readmission; rectal examination; reference emitter; reflux esophagitis; regional e... |
| RFA | resident functional atlas; right femoral artery; right frontoanterior [fetal position] |