Definition of "Hemlock" :

noun: an evergreen tree

noun: soft coarse splintery wood of a hemlock tree especially the western hemlock

noun: 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

noun: poisonous drug derived from an Eurasian plant of the genus Conium

"Socrates refused to flee and died by drinking hemlock."