Any of the poisonous umbelliferous plants, of the genera
User Defined Definitions
"poisonous drug derived from an Eurasian plant of the genus Conium"
"large branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowers; usually found in damp habitats; all parts extremely poisonous"
"soft coarse splintery wood of a hemlock tree especially the western hemlock"