Definitions for icosahedronaɪˌkoʊ səˈhi drən, aɪˌkɒs ə-

This page provides all possible meanings and translations of the word icosahedron

Princeton's WordNet

  1. icosahedron(noun)

    any polyhedron having twenty plane faces


  1. icosahedron(Noun)

    a polyhedron with twenty faces; the regular icosahedron has regular triangles as faces and is one of the Platonic solids.

  2. Origin: From εἰκοσάεδρον, from εἴκοσι + ἕδρα.

Webster Dictionary

  1. Icosahedron(noun)

    a solid bounded by twenty sides or faces

  2. Origin: [Gr. ; twenty + seat, base, fr. to sit.]


  1. Icosahedron

    In geometry, an icosahedron is a polyhedron with 20 triangular faces, 30 edges and 12 vertices. A regular icosahedron with identical equilateral faces is often meant because of its geometrical significance as one of the five Platonic solids, all regular polyhedrons including the regular tetrahedron, the cube or regular hexahedron, the regular octahedron, and the regular dodecahedron with 4, 6, 8 and 12 identical faces, respectively. It has five triangular faces meeting at each vertex. It can be represented by its vertex figure as or 35, and also by Schläfli symbol {3,5}. It is the dual of the dodecahedron, which is represented by {5,3}, having three pentagonal faces around each vertex. The name comes from the Greek: εικοσάεδρον, from είκοσι "twenty" and ἕδρα "seat". The plural can be either "icosahedrons" or "icosahedra".

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