transcription, транскрипция: [ ˌte-trə-ˈhē-drən ]
noun
( plural -drons or tet·ra·he·dra -drə)
Etymology: New Latin, from Late Greek tetraedron, neuter of tetraedros having four faces, from Greek tetra- + hedra seat, face — more at sit
Date: 1570
: a polyhedron that has four faces