any of a genus (Trillium) of perennial plants of the lily family, having an erect stem that bears a whorl of three leaves and a single flower with three green sepals and three petals that change color as they mature
Origin of trilliumModern Latin ; from Classical Latin tri-, three
Any of various plants of the genus Trillium, of North America, the Himalaya Mountains, and eastern Asia, having a whorl of three leaflike bracts and a usually white, reddish, or yellow three-petaled flower. Also called birthroot, wake-robin.
Origin of trilliumNew Latin Trillium, genus name, probably from Swedish trilling, triplet (from its three leaflike bracts), from obsolete Swedish tri, three, from Old Swedish thr&imacron;r; see trei- in Indo-European roots.
- Any of several perennial flowering plants, of the genus Trillium, having flowers with three petals