tetrahedron

[ te-truh-hee-druh n ]
/ ˌtɛ trəˈhi drən /

noun, plural tet·ra·he·drons, tet·ra·he·dra [te-truh-hee-druh] /ˌtɛ trəˈhi drə/.

Geometry. a solid contained by four plane faces; a triangular pyramid.
any of various objects resembling a tetrahedron in the distribution of its faces or apexes.

Origin of tetrahedron

1560–70; tetra- + -hedron, modeled on Late Greek tetráedron, noun use of neuter of tetráedros four-sided

Words nearby tetrahedron

tetragonal trisoctahedron, tetragram, tetragrammaton, tetrahedral, tetrahedrite, tetrahedron, tetrahydrate, tetrahydric, tetrahydro-, tetrahydrocannabidinol, tetrahydrocannabinol

Example sentences from the Web for tetrahedron

British Dictionary definitions for tetrahedron

tetrahedron
/ (ˌtɛtrəˈhiːdrən) /

noun plural -drons or -dra (-drə)

a solid figure having four plane faces. A regular tetrahedron has faces that are equilateral triangles See also polyhedron
any object shaped like a tetrahedron

Derived forms of tetrahedron

tetrahedral, adjective tetrahedrally, adverb

Word Origin for tetrahedron

C16: from New Latin, from Late Greek tetraedron; see tetra-, -hedron

Scientific definitions for tetrahedron

tetrahedron
[ tĕt′rə-hē′drən ]

Plural tetrahedrons tetrahedra

A polyhedron having four faces.