| 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... |
| C-Peptide | Connecting Peptide |
| ERP | early receptor potential; effective refractory period; elodoisin-related peptide; endoscopic retrogr... |