(n)any liliaceous plant of the genus Trillium having a whorl of three leaves at the top of the stem with a single three-petaled flower, Syn.wood lily, wake-robin
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
‖n. [ NL.; cf. L. trilix triple-woven, triple. ] (Bot.) A genus of liliaceous plants; the three-leaved nightshade; -- so called because all the parts of the plant are in threes. [ 1913 Webster ]