dodecahedron

[ doh-dek-uh-hee-druhn, doh-dek- ]

/ doʊˌdɛk əˈhi drən, ˌdoʊ dɛk- /

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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.

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His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Origin of dodecahedron

First recorded in 1560–70; dodeca- + -hedron

OTHER WORDS FROM dodecahedron

do·dec·a·he·dral, adjective

Words nearby dodecahedron

doddle, Dodds, doddy, dodeca-, dodecagon, dodecahedron, dodecanal, Dodecanese, dodecanoic acid, dodecaphonic, dodecaphonism

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use dodecahedron in a sentence

Here’s one shown on the net of the dodecahedron, hiding in plain sight.
The Crooked Geometry of Round Trips|Patrick Honner|January 13, 2021|Quanta Magazine
Mathematicians proved this five years ago, but the dodecahedron wasn’t on their list.
The Crooked Geometry of Round Trips|Patrick Honner|January 13, 2021|Quanta Magazine
In fact, they found infinitely many straight paths on the surface of the dodecahedron that start and end on the same vertex without passing through any others.
The Crooked Geometry of Round Trips|Patrick Honner|January 13, 2021|Quanta Magazine
By adapting Finster’s algorithm, the researchers were able to identify all the straight paths on the dodecahedron from a corner to itself, and to classify these paths via the dodecahedron’s hidden symmetries.
Mathematicians Report New Discovery About the Dodecahedron|Erica Klarreich|August 31, 2020|Quanta Magazine

The Dodecahedron, having twelve regular pentagons (or five-sided figures) as faces.
Bygone Beliefs|H. Stanley Redgrove
The rhombic dodecahedron is not regular, for though the lines and surfaces are equal, the angles are not.
Occult Chemistry|Annie Besant and Charles W. Leadbeater
Two of these generate the cube and the octahedron; five of these generate the dodecahedron and the icosahedron.
Occult Chemistry|Annie Besant and Charles W. Leadbeater
The “rhombic dodecahedron,” one of the geometrical semiregular solids, is an important crystal form.
Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5|Various
The “ordinary dodecahedron” is one of the Platonic solids (see Polyhedron).
Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5|Various

British Dictionary definitions for dodecahedron

dodecahedron

/ (ˌdəʊdɛkəˈhiːdrən) /

noun

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

Derived forms of dodecahedron

dodecahedral, 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 dodecahedron

dodecahedron

[ dō′dĕk-ə-hē′drən ]

Plural dodecahedrons dodecahedra

A polyhedron having twelve faces.