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dodecahedron

noun

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 dodecahedron (audio)
: a solid having 12 plane faces
dodecahedral adjective

Example Sentences

Recent Examples on the Web Among the artifacts recovered is a rare Roman dodecahedron, or hollow copper object possibly used as a weapon or measuring device, as scholar Michael Guggenberger wrote in a 2013 Mathematical Intelligencer article. Isis Davis-marks, Smithsonian Magazine, 18 Dec. 2020 Now Jayadev Athreya, David Aulicino and Patrick Hooper have shown that an infinite number of such paths do in fact exist on the dodecahedron. Quanta Magazine, 31 Aug. 2020 Now, a trio of mathematicians has resolved one of the most basic questions about the dodecahedron. Quanta Magazine, 31 Aug. 2020 The dodecahedron symbolized all the heavenly bodies — the stars and planets, each perfect in shape and movement. Quanta Magazine, 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, 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, BostonGlobe.com, 30 May 2018 Stark’s pieces are dodecahedrons, and in one, cutouts of a clock face tick the hours away. Cate Mcquaid, BostonGlobe.com, 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, 10 Aug. 2017 See More

Word History

Etymology

Greek dōdekaedron, from dōdeka- + -edron -hedron

First Known Use

circa 1570, in the meaning defined above

Time Traveler
The first known use of dodecahedron was circa 1570

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