# polyhedron

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Related to polyhedra: Regular polyhedra

## pol·y·he·dron

(pŏl′ē-hē′drən)*n.*

*pl.*

**pol·y·he·drons**or

**pol·y·he·dra**(-drə)

A solid bounded by polygons.

**pol′y·he′dral**

*adj.*

## polyhedron

(ˌpɒlɪˈhiːdrən)*n*,

*pl*

**-drons**

*or*

**-dra**(-drə)

(Mathematics) 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]**ˌpolyˈhedral**

*adj*

## pol•y•he•dron

(ˌpɒl iˈhi drən)*n.,*

*pl.*

**-drons, -dra**(-drə).

a solid figure having many faces.

**pol`y•he′dral,**

*adj.*

## pol·y·he·dron

(pŏl′ē-hē′drən) A three-dimensional geometric figure whose sides are polygons. A tetrahedron, for example, is a polyhedron having four triangular sides.

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Noun | 1. | polyhedron - a solid figure bounded by plane polygons or facessolid - a three-dimensional shape convex polyhedron - a polyhedron any plane section of which is a convex polygon concave polyhedron - a polyhedron some of whose plane sections are concave polygons prism - a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms pyramid - a polyhedron having a polygonal base and triangular sides with a common vertex tetrahedron - any polyhedron having four plane faces pentahedron - any polyhedron having five plane faces hexahedron - any polyhedron having six plane faces octahedron - any polyhedron having eight plane faces decahedron - any polyhedron having ten plane faces dodecahedron - any polyhedron having twelve plane faces icosahedron - any polyhedron having twenty plane faces ideal solid, Platonic body, Platonic solid, regular convex polyhedron, regular convex solid, regular polyhedron - any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent prismatoid - a polyhedron whose vertices all lie in one or the other of two parallel planes; the faces that lie in those planes are the bases of the prismatoid trapezohedron - a polyhedron whose faces are trapeziums |

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