icosahedra

icosahedron

[ahy-koh-suh-hee-druhn, ahy-kos-uh-]
noun, plural icosahedrons, icosahedra [ahy-koh-suh-hee-druh, ahy-kos-uh-] .
a solid figure having 20 faces.

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

icosahedral, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To icosahedra
Collins
World English Dictionary
icosahedron (ˌaɪkəsəˈhiːdrən)
 
n , pl -drons, -dra
a solid figure having 20 faces. The faces of a regular icosahedron are equilateral triangles
 
[C16: from Greek eikosaedron, from eikosi twenty + -edron-hedron]
 
icosa'hedral
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Science Dictionary
icosahedron   (ī-kō'sə-hē'drən)  Pronunciation Key 


(click for larger image in new window)

Plural icosahedrons or icosahedra
A polyhedron having twenty faces.

icosahedral adjective
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature