| Sp | Pn, Sp Pnx spontaneous pneumothorax |
|---|---|
| SR | sarcoplasmic reticulum; saturation recovery; scanning radiometer; screen; secretion rate; sedimentat... |
| SSCA | spontaneous suppressor cell activity |
| SV | saphenous vein; sarcoma virus; satellite virus; selective vagotomy; semilunar valve; seminal vesicle... |
| LSA | Last Spontaneous Abortion |