icosahedron

English
A regular icosahedron

Alternative forms

Etymology

From Ancient Greek εἰκοσάεδρον (eikosáedron), from εἴκοσι (eíkosi, “twenty”) + ἕδρα (hédra, “face of a geometrical solid”).

Noun

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

Translations
This article is issued from Wiktionary. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.