tet·ra·he·dron (t t r -h  drn)n. pl. tet·ra·he·drons or tet·ra·he·dra (-dr ) A polyhedron with four faces. [Late Greek tetraedron, from Greek, neuter of tetraedros, four-faced : tetra-, tetra- + hedr  , face of a geometric solid; see sed- in Indo-European roots.] |   |
tetrahedron [ˌtɛtrəˈhiːdrən]
n pl -drons, -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
[from New Latin, from Late Greek tetraedron; see tetra-, -hedron]
tetrahedral adj
tetrahedrally adv
| tetrahedron (ttr-hdrn) Plural tetrahedrons or tetrahedra A polyhedron having four faces. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  tetrahedron - any polyhedron having four plane facespolyhedron - a solid figure bounded by plane polygons or faces |
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