(1):
(n.) An evergreen tree common in North America (Abies, / Tsuga, Canadensis); hemlock spruce.
(2):
(n.) The wood or timber of the hemlock tree.
(3):
(n.) The name of several poisonous umbelliferous herbs having finely cut leaves and small white flowers, as the Cicuta maculata, bulbifera, and virosa, and the Conium maculatum. See Conium.