| QRS-T | the angle between the QRS and T vectors in vectorcardiography [angle] |
|---|---|
| S | Greek capital letter sigma; syphilis; summation of series |
| s | Greek lower case letter sigma; conductivity; cross section; millisecond; molecular type or bond; pop... |
| SR | sarcoplasmic reticulum; saturation recovery; scanning radiometer; screen; secretion rate; sedimentat... |
| CPA tumor | Cerebello-Pontine Angle(소뇌교각부) tumor |