Definition that contains genus trillium
- trillium 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
- wood lily 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
- wake-robin 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