| RF | radial fiber; radio frequency; receptive field; regurgitant fraction; Reitland-Franklin [unit]; rela... |
|---|---|
| Rh | F rheumatic fever |
| RMSF | Rocky Mountain spotted fever |
| RVF | renal vascular failure; Rift Valley fever; right ventricular failure; right visual field |
| SFV | Semliki Forest virus; shipping fever virus; Shope fibroma virus; squirrel fibroma virus |