[ pol-ee-hee-druh n ]
/ ˌpɒl iˈhi drən /

noun, plural pol·y·he·drons, pol·y·he·dra [pol-ee-hee-druh] /ˌpɒl iˈhi drə/.

a solid figure having many faces.

Nearby words

  1. polygynous,
  2. polygyny,
  3. polygyria,
  4. polyhedral,
  5. polyhedral angle,
  6. polyhedrosis,
  7. polyhidrosis,
  8. polyhistor,
  9. polyhydramnios,
  10. polyhydric

Origin of polyhedron

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for polyhedron

British Dictionary definitions for polyhedron


/ (ˌpɒlɪˈhiːdrən) /

noun plural -drons or -dra (-drə)

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
Derived Formspolyhedral, adjective

Word Origin for polyhedron

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



1560s, from Latinized form of Greek polyedron, neuter of adjective polyedros "having many bases or sides," from polys "many" (see poly-) + hedra "seat, base, chair, face of a geometric solid," from PIE root *sed- (1) "to sit" (see sedentary).

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for polyhedron


[ pŏl′ē-hēdrən ]

Plural polyhedrons polyhedra

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

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.