Definition of: hemlock

(hem′lok) noun
1. An evergreen tree (genus Tsuga) of North America and Asia.
2. The wood of this tree.
3. The hemlock spruce.
4. The spotted hemlock (Conium maculatum), a large biennial herb of the parsley or carrot family, yielding coniine: also poison hemlock.
5. A poison made from the unripe dried fruit of this herb: Socrates drank the hemlock.
6. Any of several related herbs, as the water hemlock (Cicuta maculata). [OE hymlice]