trillium means any of several perennial flowering plants, of the genus Trillium, having flowers with three petals. Lexicurio rates it Sui generis — a strength score of 86 out of 100.
trillium is pronounced /ˈtɹɪli.əm/.
Etymology
From the genus name.
noun
- Any of several perennial flowering plants, of the genus Trillium, having flowers with three petals