Dictionary

tetrahedron

noun tet·ra·he·dron \ˌte-trə-ˈhē-drən\
plural tet·ra·he·drons or tet·ra·he·dra\-drə\

Definition of TETRAHEDRON

:  a polyhedron that has four faces

Illustration of TETRAHEDRON

Origin of TETRAHEDRON

New Latin, from Late Greek tetraedron, neuter of tetraedros having four faces, from Greek tetra- + hedra seat, face — more at sit
First Known Use: 1570

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