Trillium definition

trĭlē-əm
Frequency:
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.
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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.
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Any of several perennial flowering plants, of the genus Trillium, having flowers with three petals.
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Other Word Forms

Noun

Singular:
trillium
Plural:
trilliums

Origin of trillium

  • New Latin Trillium genus name probably from Swedish trilling triplet (from its three leaflike bracts) from obsolete Swedish tri three from Old Swedish thrīr trei- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition