Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.
Class I. Words Expressing Abstract RelationsSection V. Number
2. Determinate Number
94. [Division into Three Parts.] Trisection.
triadelphous, triangular, trichotomic, tricuspid, tricapsular, tridental, tridentate or tridentated, tridentiferous, trifoliolate, trifurcate or trifurcated, trigonoid, trigonous, trigonal, trigrammic or trigrammatic, tripedal, trilateral, tripetalous, tripodal, tripodic, triquetral, triquetrous.