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dodecahedron

American  
[doh-dek-uh-hee-druhn, doh-dek-] / doʊˌdɛk əˈhi drən, ˌdoʊ dɛk- /

noun

Geometry, Crystallography.
  • dodecahedrons,
    plural
  • dodecahedra
    plural
  1. a solid figure having 12 faces.


dodecahedron British  
/ ˌdəʊdɛkəˈhiːdrən /

noun

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

"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

dodecahedron Scientific  
/ dō′dĕk-ə-hēdrən /
  • dodecahedrons
    plural
  1. A polyhedron having twelve faces.


Other Word Forms

Derived Forms

Inflected Forms

Nouns

Etymology

Origin of dodecahedron

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

"What we do know is the Norton Disney dodecahedron was found on the top of a hill in a former large pit of some kind. It seems it was deliberately placed there."

From BBC Apr. 29, 2024

Granted, the shape is dramatically different than the one that existed when minor-league ball was shuttered last summer — like a square becoming a dodecahedron.

From Seattle Times Dec. 2, 2020

This involves two different polyhedra with the same volume: an irregular dodecahedron with pentagonal faces, possessing tetrahedral symmetry, and a tetrakaidecahedron, which has two hexagonal and 12 pentagonal faces possessing antiprismatic symmetry.

From Slate Jul. 22, 2015

We can’t tile the plane with them, but we can stick a bunch of them together and close them up into a very nice surface, the dodecahedron.

From Scientific American Nov. 17, 2013

For some reason, knowledge of a solid called the dodecahedron having twelve pentagons as sides seemed to them dangerous.

From "Cosmos" by Carl Sagan

So far, there is not much to do in the eleVR world, apart from exploring tilings made of geometric shapes such as pentagons and dodecahedra.

From Nature Mar. 20, 2017

Many other dodecahedra exist as crystal forms, for which see Crystallography.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5 "Dinard" to "Dodsworth" by Various

The garnet sometimes forms good dodecahedra, but may occur as rounded grains, and encloses quartz, rutile, kyanite, and other minerals very frequently.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 "Echinoderma" to "Edward" by Various

The object is one of only 33 dodecahedrons found in Britain, and the first to have been discovered in the Midlands.

From BBC May 4, 2024

The object is one of only 33 dodecahedrons ever found in Britain, and the first to have been discovered in the Midlands.

From BBC Apr. 29, 2024

He built each piece originally in tiny paper tetrahedrons, octahedrons or dodecahedrons.

From Time Magazine Archive

Iron pyrites is commonly of a bright brass-yellow color, and is found crystallized in cubes, dodecahedrons and many other forms.

From Golden Days for Boys and Girls Volume VIII, No 25: May 21, 1887 by James Elverson

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