| SLR | Shwartzman local reaction; single lens reflex; straight leg raising |
|---|---|
| SPAR | sensitivity prediction by acoustic reflex |
| SR | sarcoplasmic reticulum; saturation recovery; scanning radiometer; screen; secretion rate; sedimentat... |
| STNR | symmetric tonic neck reflex |
| TF | free thyroxine; tactile fremitus; tail flick [reflex]; temperature factor; testicular feminization; ... |