adj.
Pronunciation: te- ' tra-g ə -n ə l
Function: adjective
Etymology: Late Latin tetragonalis having four angles and four sides, from tetragonum quadrangle, from Greek tetrag ō non, from neuter of tetrag ō nos tetragonal, from tetra- + g ō nia angle ― more at -GON
Date: 1868
: of, relating to, or characteristic of the tetragonal system
– te · trag · o · nal · ly \ -n ə l- ē \ adverb