Platykurtic
A distribution with Fisher Kurtosis 
(and therefore having a flattened shape).
- Star of David
- Star of Goliath
- Star of Lakshmi
- Star Polygon
- Star Polyhedron
- Starr Rose
- State Space
- Stationary Point
- Stationary Tangent
- Stationary Value
- Statistic
- Statistical Test
- Statistics
- Staudt-Clausen Theorem
- Steenrod Algebra
- Steenrod-Eilenberg Axioms
- Steenrod's Realization Problem
- Steepest Descent Method
- Steffensen's Inequality
- Steffenson's Formula
- Steinbach Screw
- Steiner Chain
- Steiner Construction
- Steinerian Curve
- Steiner-Lehmus Theorem