icosahedron

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Icosahedron

Wikipedia

A regular icosahedron

Alternative formsEdit

• eicosaedrum (obsolete)
• icosaedrum (obsolete)

EtymologyEdit

From Ancient Greek εἰκοσάεδρον (eikosaedron), from εἴκοσι (eikosi, “twenty”) + ἕδρα (hedra, “face of a geometrical solid”).

NounEdit

icosahedron (plural icosahedra or icosahedrons)

1. (geometry) A polyhedron with twenty faces.
2. (geometry, specifically) A regular icosahedron: one of the Platonic solids, all of whose faces are regular (equilateral) triangles

TranslationsEdit

Related termsEdit

• icosahedral
• truncated icosahedron