• synonyms


[doh-dek-uh-hee-druh n, doh-dek-]
noun, plural do·dec·a·he·drons, do·dec·a·he·dra [doh-dek-uh-hee-druh, doh-dek-] /doʊˌdɛk əˈhi drə, ˌdoʊ dɛk-/. Geometry, Crystallography.
  1. a solid figure having 12 faces.
Show More

Origin of dodecahedron

First recorded in 1560–70; dodeca- + -hedron
Related formsdo·dec·a·he·dral, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for dodecahedron

Historical Examples of dodecahedron

  • You might as well call it a dodecahedron, or the cube root of minus nothing.'

    'That Very Mab'

    May Kendall and Andrew Lang

  • Iamblichus here refers to the dodecahedron inscribed in the sphere.

    The Teaching of Geometry

    David Eugene Smith

  • Cleavage obtains parallel to the dodecahedron, but is imperfect.

  • A cube would therefore be represented numerically by seven, a dodecahedron by thirteen.

  • That for the tetrahedron has 12 for its order, for the cube (or octahedron) 24, and for the icosahedron (or dodecahedron) 60.

British Dictionary definitions for dodecahedron


  1. a solid figure having twelve plane faces. A regular dodecahedron has regular pentagons as facesSee also polyhedron
Show More
Derived Formsdodecahedral, 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

Word Origin and History for dodecahedron


1560s, from Greek dodeka "twelve" (short for duodeka, from duo "two" + deka "ten;" cf. dozen) + hedra "seat, base, chair, face of a geometric solid," from PIE root *sed- (1) "to sit" (see sedentary).

Show More
Online Etymology Dictionary, © 2010 Douglas Harper

dodecahedron in Science


Plural dodecahedrons dodecahedra
  1. A polyhedron having twelve faces.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.