from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A polyhedron with 12 faces.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A polyhedron with twelve faces; the regular dodecahedron has regular pentagons as faces and is one of the Platonic solids.

from the GNU version of the Collaborative International Dictionary of English

  • n. A solid having twelve faces.

from The Century Dictionary and Cyclopedia

  • n. In geometry, a solid having twelve faces. Also duodecahedron.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any polyhedron having twelve plane faces


Greek dōdekaedron : dōdeka, twelve; see dodecagon + -edron, -hedron.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek δωδεκάεδρον. (Wiktionary)



Log in or sign up to get involved in the conversation. It's quick and easy.

  • Don't jump to Conclusions!

    November 19, 2008

  • Yes, there are references to it at octopus, inner thesaurus and hippopotamonomatopoeia. But no one has made a Tollboth list yet . . .

    November 19, 2008

  • Has anyone here read 'The Phantom Tollbooth'? The dodecahedron was one of my favorite characters when I read it as a kid.

    November 19, 2008

  • It is often referred to by lower forms of life as a 'D12'.

    August 16, 2008

  • Constructing? Just saying this is teh alsome!

    August 16, 2008

  • Constructing these is just totally awesome. I demonstrated it out of Euclid last year; basically you just mark off golden sections on a cube, raise equal lines perpendicularly, and connect the dots. I even made a model.

    August 16, 2008