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polyhedron

[ pol-ee-hee-druhn ]

noun

, plural pol·y·he·drons, pol·y·he·dra [pol-ee-, hee, -dr, uh].
  1. a solid figure having many faces.


polyhedron

/ ˌpɒlɪˈhiːdrən /

noun

  1. a solid figure consisting of four or more plane faces (all polygons), pairs of which meet along an edge, three or more edges meeting at a vertex. In a regular polyhedron all the faces are identical regular polygons making equal angles with each other. Specific polyhedrons are named according to the number of faces, such as tetrahedron, icosahedron, etc
“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


polyhedron

/ pŏl′ē-hēdrən /

, Plural polyhedrons

  1. A three-dimensional geometric figure whose sides are polygons. A tetrahedron, for example, is a polyhedron having four triangular sides.
  2. ◆ A regular polyhedron is a polyhedron whose faces are all congruent regular polygons. The regular tetrahedron (pyramid), hexahedron (cube), octahedron, dodecahedron, and icosahedron are the five regular polyhedrons. Regular polyhedrons are a type of Archimedean solid.


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Derived Forms

  • ˌpolyˈhedral, adjective
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Word History and Origins

Origin of polyhedron1

1560–70; < Greek polýedron, neuter of polýedros having many bases. See poly-, -hedron
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Word History and Origins

Origin of polyhedron1

C16: from Greek poluedron, from poly- + hedron side, base
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Example Sentences

If we make a polyhedron out of clay, mark the edges with a Sharpie, and roll it into a ball, the faces and edges become curved but their number doesn’t change.

Synacral, sin-ak′ral, adj. having a common vertex, as faces of a polyhedron.

Crime, he admitted, is a very complex phenomenon; it is a sort of polyhedron, of which every one sees a special side.

"Polyhedron" is from the Greek polys (many) and hedra (seat).

The points thus obtained are evidently the vertices of a polyhedron with plane faces.

In the first place, each of these figures may be conceived as an orthogonal projection of a closed plane-faced polyhedron.

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polyhedral anglepolyhedrosis