Definition:Number Prefixes/4/Tetra-

Definition

The prefix tetra- denotes $4$.

Examples

The prefix tetra- can be found in the following contexts:

• tetrad: a set or ordered tuple with $4$ elements

• tetragon: a less-common name than quadrilateral for a polygon with $4$ sides and hence $4$ vertices

• tetrahedron: a polyhedron with $4$ faces

• tetravalent predicate: a predicate with a valency of $4$

Linguistic Note

The prefix tetra- derives from the Classical Greek τέτταρες (téttares) and τέσσαρες (téssares), meaning four.

Sources

• 1989: Ephraim J. Borowski and Jonathan M. Borwein: Dictionary of Mathematics ... (previous) ... (next): tetra-