'Trillium' definitions:

Definition of 'trillium'

(from WordNet)
noun
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: trillium, wood lily, wake-robin]

Definition of 'Trillium'

From: GCIDE
  • Trillium \Tril"li*um\, 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]