[pol-ee-hee-druh l]

Origin of polyhedral

1805–15; < Greek polýedr(os) many-based (see polyhedron) + -al1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for polyhedral

Historical Examples of polyhedral

Word Origin and History for polyhedral

1741, from polyhedron + -al (1).

Online Etymology Dictionary, © 2010 Douglas Harper

polyhedral in Science


Plural polyhedrons polyhedra
  1. 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.
Related formspolyhedral adjective
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