| SGV | salivary gland virus; selective gastric vagotomy |
|---|---|
| SLI | selective lymphoid irradiation; somatostatin-like immunoreactivity; splenic localization index |
| SNR | selective nerve root [block]; signal-to-noise ratio; substantia nigra zona reticulata; supernumerary... |
| SNRB | selective nerve root block |
| SPEAR | selective parenteral and enteral anti-sepsis regimen |