| trill | 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 |
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| trill | trillium of eastern North America having malodorous pink to purple flowers and an astringent root used in fold medicine especially to ease childbirth |
| trill | small family of herbs having flowers with 3 petals and 3 sepals |
| trill | trillium of central United States having dark purple sessile flowers |
| trill | trillium of northeastern United States with sessile leaves and red or purple flowers having a pungent odor |