- a solid figure having many faces.
Origin of polyhedron
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for polyhedron
The division of a Polyhedron ariseth from the bases upon which it standeth.The Way To Geometry
"Polyhedron" is from the Greek polys (many) and hedra (seat).The Teaching of Geometry
David Eugene Smith
Such a polyhedron (πολύς, many, ἕδρα, base or face) is known as a crystal.
The points thus obtained are evidently the vertices of a polyhedron with plane faces.
Synacral, sin-ak′ral, adj. having a common vertex, as faces of a polyhedron.
- 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
C16: from Greek poluedron, from poly- + hedron side, base
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
Word Origin and History for polyhedron
Online Etymology Dictionary, © 2010 Douglas Harper
- A three-dimensional geometric figure whose sides are polygons. A tetrahedron, for example, is a polyhedron having four triangular sides.♦ 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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