| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |
|---|---|
| SIECUS | Sex Information and Education Council of the United States |
| SKAT | Sex Knowledge and Attitude Test |
| SLHR | sex-linked hypophosphatemic rickets |
| SLP | left sacroposterior [fetal position] [Lat. sacrolaeva posterior]; segmental limb systolic pressure; ... |