Trilinear Polar
Given a Triangle Center 
, the line
is called the trilinear polar of
and is denoted 
.See also Chasles's Polars Theorem- Space-Filling Curve
- Space-Filling Function
- Space-Filling Polyhedron
- Space Groups
- Space of Closed Paths
- Span (Geometry)
- Span (Link)
- Span (Polynomial)
- Span (Set)
- Span (Vectors)
- Sparse Matrix
- Spearman Rank Correlation Coefficient
- Special Curve
- Special Function
- Special Linear Group
- Special Matrix
- Special Orthogonal Group
- Special Point
- Special Series Theorem
- Special Unitary Group
- Species
- Specificity
- Spectral Norm
- Spectral Power Density
- Spectral Radius