| SAPK | stress-activated protein kinase |
|---|---|
| SDF | slow death factor; stress distribution factor |
| SECG | stress electrocardiography |
| SF | Sabin-Feldman [test]; safety factor; salt-free; scarlet fever; screen film; seminal fluid; serosal f... |
| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |