ROGET THESAURUS
trichotomous
Trisection
N
trisection, tripartition, trichotomy, third, third part, trifid, trisected, tripartite,
trichotomous, trisulcate, Triadelphous, triangular, tricuspid, tricapsular, tridental, tridentate, tridentiferous, trifoliate, trifurcate, trigonal, trigrammic, trigrammatic, tripetalous, tripodal, tripodic, triquetral, triquetrous.