Synonyms and related words :
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