| RF | radial fiber; radio frequency; receptive field; regurgitant fraction; Reitland-Franklin [unit]; rela... |
|---|---|
| SFAP | single-fiber action potential |
| SFEMG | single fiber electromyography |
| SODF | sperm outer defense fiber |
| STF | serum thymus factor; slow-twitch fiber; special tube feeding; specialized treatment center; stefin; ... |