tetrahedron
English
editAlternative forms
editEtymology
editFrom Ancient Greek τετράεδρον (tetráedron, “triangle-based pyramid”), from τετράεδρος (tetráedros), from τετράς (tetrás, “four”) + ἕδρα (hédra, “seat”). By surface analysis, tetra- + -hedron.
Pronunciation
editNoun
edittetrahedron (plural tetrahedrons or tetrahedra)
- (geometry) A polyhedron with four faces; the regular tetrahedron, the faces of which are equal equilateral triangles, is one of the Platonic solids.
Derived terms
editTranslations
editpolyhedron
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Categories:
- English terms derived from Ancient Greek
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- English terms suffixed with -hedron
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- en:Four
- en:Polyhedra