icosahedron
English
editAlternative forms
editEtymology
editFrom Ancient Greek εἰκοσάεδρον (eikosáedron), from εἴκοσι (eíkosi, “twenty”) + ἕδρα (hédra, “face of a geometrical solid”). Equivalent to icosa- + -hedron.
Pronunciation
editNoun
editicosahedron (plural icosahedra or icosahedrons)
- (geometry) A polyhedron with twenty faces.
- (geometry, specifically) A regular icosahedron: one of the Platonic solids, all of whose faces are regular (equilateral) triangles
- Synonym: regular gyroelongated pentagonal bipyramid
Derived terms
editRelated terms
editTranslations
edita polyhedron
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