- slant height of a pyramid
- Slater condition
- slaving principle
- sliding friction
- sliding friction force
- sliding mode
- sliding reflection in space
- sliding reflection plane
- sliding rope curve
- S-limit
- slope-deflection method
- slope function
- slope intercept form equation of a straight line
- slope line
- slope of a straight line
- slope-ratio assays
- slow manifold method for singularly perturbed systems
- slow relaxing variable
- slow varying component of solar radio radiation
- SLp domain
- SLp域
- Sluse conchoid
- Slutsky equation
- Smale horse shoe
- Smale's horseshoe