[ ahy-koh-suh-hee-druhn, ahy-kos-uh- ]

noun,plural i·co·sa·he·drons, i·co·sa·he·dra [ahy-koh-suh-hee-druh, ahy-kos-uh-]. /aɪˌkoʊ səˈhi drə, aɪˌkɒs ə-/.
  1. a solid figure having 20 faces.

Origin of icosahedron

1560–70; <Greek eikosáedron, equivalent to eikosa- (variant of eikosi-, combining form of eíkosi twenty) + -edron-hedron

Other words from icosahedron

  • i·co·sa·he·dral, adjective

Words Nearby icosahedron

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How to use icosahedron in a sentence

British Dictionary definitions for icosahedron


/ (ˌaɪkəsəˈhiːdrən) /

nounplural -drons or -dra (-drə)
  1. a solid figure having 20 faces. The faces of a regular icosahedron are equilateral triangles

Origin of icosahedron

C16: from Greek eikosaedron, from eikosi twenty + -edron -hedron

Derived forms of icosahedron

  • icosahedral, adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for icosahedron


[ ī-kō′sə-hēdrən ]

Plural icosahedrons icosahedra
  1. A polyhedron having twenty faces.

Other words from icosahedron

  • icosahedral adjective

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