[ doh-dek-uh-hee-druh n, doh-dek- ]
/ doʊˌdɛk əˈhi drən, ˌdoʊ dɛk- /

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.

a solid figure having 12 faces.

Origin of dodecahedron

First recorded in 1560–70; dodeca- + -hedron
Related formsdo·dec·a·he·dral, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for dodecahedron

British Dictionary definitions for dodecahedron


/ (ˌdəʊdɛkəˈhiːdrən) /


a solid figure having twelve plane faces. A regular dodecahedron has regular pentagons as facesSee also polyhedron
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).

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for dodecahedron


[ dō′dĕk-ə-hēdrən ]

Plural dodecahedrons dodecahedra

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