| SCLC | small cell lung carcinoma |
|---|---|
| scRNA | small cytoplasmic ribonucleic acid |
| SFD | silo filler's disease; skin-film distance; small for dates; spectral frequency distribution |
| SGA | small for gestational age |
| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |