• 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

  Example: "Socrates refused to flee and died by drinking hemlock"

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