Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.
Class I. Words Expressing Abstract RelationsSection V. Number
2. Determinate Number
92. Triality.
THREE, triad, triplet, ternion, ternary, trine [rare], trey, trio, leash; shamrock, tierce, delta, spike-team [U. S.], trefoil; triangle, trident, triennium, trigon [rare], trinomial, trionym, triplopia or triplopy, tripod, trireme, triseme, triskelion or triskele, trisul or trisula, triumvirate.
third power, cube.