Trilateral

a.

1.

(Geom.) Having three sides; being three-sided; as, a trilateral triangle.

Noun	1.	trilateral - a three-sided polygon Synonyms: triangle, trigon
Adj.	1.	trilateral - involving three parties or elements; "the triangular mother-father-child relationship"; "a trilateral agreement"; "a tripartite treaty"; "a tripartite division"; "a three-way playoff" Synonyms: three-party, three-way, tripartite, triangular
	2.	trilateral - having three sides; "a trilateral figure" Synonyms: three-sided, triangular

bifacial, bilateral, cuneate, cuneated, cuneiform, deltoid, dihedral, flanked, handed, lateral, many-sided, multilateral, one-sided, oxygonal, polyhedral, quadrilateral, sided, tetrahedral, three-cornered, three-dimensional, three-footed, three-pronged, three-sided, triangular, triangulate, triarch, trichotomous, tricorn, tricornered, tricuspid, trident, tridental, trifid, triflorate, triflorous, trifurcate, trigonal, trigonoid, trigrammatic, trihedral, trimerous, triparted, tripartite, tripodic, triquetral, triquetrous, trisected, two-sided, unilateral