hemlock
1. [ noun ] soft coarse splintery wood of a hemlock tree especially the western hemlock
Related terms: wood
2. [ noun ] (botany) 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
Synonyms: poison_parsley California_fern Nebraska_fern winter_fern Conium_maculatum poison_hemlock
Related terms: poisonous_plant Conium
3. [ noun ] (biology,medicine,immunology,pharmacology) poisonous drug derived from an Eurasian plant of the genus Conium
Examples:

"Socrates refused to flee and died by drinking hemlock"

Related terms: phytotoxin
4. [ noun ] (botany) an evergreen tree
Synonyms: hemlock_tree
Related terms: conifer eastern_hemlock mountain_hemlock western_hemlock Carolina_hemlock Tsuga