| Noun | 1. | false hellebore - perennial herbs of the lily family having thick toxic rhizomesliliaceous plant - plant growing from a bulb or corm or rhizome or tuber genus Veratrum, Veratrum - a genus of coarse poisonous perennial herbs; sometimes placed in subfamily Melanthiaceae American hellebore, bugbane, Indian poke, Veratrum viride, white hellebore - North American plant having large leaves and yellowish green flowers growing in racemes; yields a toxic alkaloid used medicinally |