Definition:Number Prefixes/4/Tetra-
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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-