do·​deca·​he·​dron | \ (ˌ)dō-ˌde-kə-ˈhē-drən How to pronounce dodecahedron (audio) \
plural dodecahedrons or dodecahedra\ (ˌ)dō-​ˌde-​kə-​ˈhē-​drə How to pronounce dodecahedra (audio) \

Definition of dodecahedron

: a solid having 12 plane faces

Keep scrolling for more

Other Words from dodecahedron

dodecahedral \ (ˌ)dō-​ˌde-​kə-​ˈhē-​drəl How to pronounce dodecahedral (audio) \ adjective

Examples of dodecahedron in a Sentence

Recent Examples on the Web Now, a trio of mathematicians has resolved one of the most basic questions about the dodecahedron. Quanta Magazine, "Mathematicians Report New Discovery About the Dodecahedron," 31 Aug. 2020 The dodecahedron symbolized all the heavenly bodies — the stars and planets, each perfect in shape and movement. Quanta Magazine, "The Two Forms of Mathematical Beauty," 16 June 2020 Here, the walls are decorated simply with some abstract decals, and bare light bulbs caged in metal dodecahedrons hang from the ceiling. San Francisco Chronicle, "Soleil Ho | Hina Yakitori’s $110 tasting menu unleashes the power of poultry, and it's worth it," 29 Nov. 2019 This show was originally installed at Oakville Galleries, in Oakville, Ontario, on the outer walls of a dodecahedron, a 12-sided structure. Cate Mcquaid,, "Flattening time’s tides; a ‘Maid’ made in the shade," 30 May 2018 Stark’s pieces are dodecahedrons, and in one, cutouts of a clock face tick the hours away. Cate Mcquaid,, "Trains of thought in arresting video artworks," 16 May 2018 They are defined by symmetry, and the Greeks knew that there were only five possibilities meeting the criteria: the tetrahedron, cube, octahedron, dodecahedron and icosahedron. Eugenia Cheng, WSJ, "Lessons of the Möbius Bagel," 10 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dodecahedron.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of dodecahedron

circa 1570, in the meaning defined above

History and Etymology for dodecahedron

Greek dōdekaedron, from dōdeka- + -edron -hedron

Keep scrolling for more

Learn More about dodecahedron

Time Traveler for dodecahedron

Time Traveler

The first known use of dodecahedron was circa 1570

See more words from the same year

Statistics for dodecahedron

Cite this Entry

“Dodecahedron.” Dictionary, Merriam-Webster, Accessed 30 Nov. 2020.

More from Merriam-Webster on dodecahedron Encyclopedia article about dodecahedron

Comments on dodecahedron

What made you want to look up dodecahedron? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

A Thanksgiving Word Quiz

  • a traditional thanksgiving dinner
  • November comes from a word for which of the following numbers?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!