# polyhedron

[ pol-ee-hee-druhn ]

noun,plural pol·y·he·drons, pol·y·he·dra [pol-ee-hee-druh]. /ˌpɒl iˈhi drə/.
1. a solid figure having many faces.

## Origin of polyhedron

1
1560–70; <Greek polýedron, neuter of polýedros having many bases. See poly-, -hedron

## Words Nearby polyhedron

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

## How to use polyhedron in a sentence

• 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.

Topology 101: The Hole Truth | David S. Richeson | January 26, 2021 | Quanta Magazine
• 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.

The Criminal | Havelock Ellis
• "polyhedron" is from the Greek polys (many) and hedra (seat).

The Teaching of Geometry | David Eugene Smith
• 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.

## British Dictionary definitions for polyhedron

polyhedron

/ (ˌpɒlɪˈhiːdrən) /

nounplural -drons or -dra (-drə)
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

## Origin of polyhedron

1
C16: from Greek poluedron, from poly- + hedron side, base

## Derived forms of polyhedron

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

## Scientific definitions for polyhedron

polyhedron

[ pŏl′ē-hēdrən ]

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.