- S romanum
- S.M.A.
- saccharephidrosis
- sacculus proprius
- Sachsse's solution
- sacral triangle
- sacriplex
- sacrococcygeus
- sadism
- Saenger's macula
- Saenger's macula's operation
- safranophil, safranophile
- sagittal suture
- Saint Louis Springs
- Saint-Sauveur
- sal alembroth
- sal diureticum
- sal potassii bromidi effervescens
- sal potassii bromidi effervescens compositua
- salep, salop