# tetrahedron

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tetrahedron

## tet·ra·he·dron

(tĕt′rə-hē′drən)
n. pl. tet·ra·he·drons or tet·ra·he·dra (-drə)
A polyhedron with four faces.

[Greek tetraedron, from neuter of tetraedros, four-faced : tetra-, tetra- + -hedros, sided; see -hedron.]

## tetrahedron

(ˌtɛtrəˈhiːdrən)
n, pl -drons or -dra (-drə)
1. (Mathematics) a solid figure having four plane faces. A regular tetrahedron has faces that are equilateral triangles. See also polyhedron
2. (Mathematics) any object shaped like a tetrahedron
[C16: from New Latin, from Late Greek tetraedron; see tetra-, -hedron]

## tet•ra•he•dron

(ˌtɛ trəˈhi drən)

n., pl. -drons, -dra (-drə).
1. a solid contained by four plane faces; a triangular pyramid.
2. any of various objects resembling a tetrahedron.
[1560–70; < Late Greek tetráedron]

## tet·ra·he·dron

(tĕt′rə-hē′drən)
A three-dimensional geometric figure with four triangular faces.
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 tetrahedron - any polyhedron having four plane facespolyhedron - a solid figure bounded by plane polygons or faces
Translations
tetràedre
čtyřstěn
tetraedri
tetraèdretétraèdre
tetraéder

tetraeder

## tetrahedron

[ˈtetrəˈhiːdrən] N (tetrahedrons, tetrahedra (pl)) [ˌtetrəˈhiːdrə]

## tetrahedron

nTetraeder nt
References in periodicals archive ?
The set of 16 pieces includes red, yellow, green and blue cylinder, square pyramid, cube, rectangular prism, cone, hexagonal prism, triangular pyramid and triangular prism, and clear plastic casings.
The NEC the WISE mark is a simple, opaque triangular pyramid with a cube in the center.
How many faces are there on the triangular pyramid known as a regular tetrahedron?
Students were asked to build a crisis shelter and create their own triangular pyramid.
The monument is composed of seven isosceles triangular pyramid shaped structures, with the middle one being the tallest.

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