Trilateral
Pronunciation : Tri*lat"er*al
Part of Speech : a.
Etymology : [L. trilaterus; tri- (see Tri-) + latus, lateris, side: cf. F. trilat?ral. See Lateral.] (Geom.)
Definition : Defn: Having three sides; being three-sided; as, a trilateral triangle. -- Tri*lat"er*al*ly, adv. -- Tri*lat"er*al*ness, n.
Source : Webster's Unabridged Dictionary, 1913