- hemlock - poisonous drug derived from an Eurasian plant of the genus Conium; "Socrates refused to flee and died by drinking hemlock"
--1 is a kind of plant toxin, phytotoxin
- hemlock, poison hemlock, poison parsley, California fern, Nebraska fern, winter fern, Conium maculatum - 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
--2 is a kind of poisonous plant
--2 is a member of Conium, genus Conium- hemlock - soft coarse splintery wood of a hemlock tree especially the western hemlock
--3 is a kind of wood
--3 is a substance of hemlock, hemlock tree- hemlock, hemlock tree - an evergreen tree
--4 is a kind of conifer, coniferous tree
--4 is a member of Tsuga, genus Tsuga
--4 has substances: hemlock
--4 has particulars: - hemlock, poison hemlock, poison parsley, California fern, Nebraska fern, winter fern, Conium maculatum - 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