Definition of poison hemlock
: a large European biennial poisonous herb (Conium maculatum) of the carrot family that is naturalized in the United States and has finely divided leaves and small white flowers — compare water hemlock
First Known Use of poison hemlock
Medical Definition of poison hemlock
1: a large European poisonous herb of the genus Conium (C. maculatum) that is naturalized in the U.S. and has finely divided leaves and white flowers
Seen and Heard
What made you want to look up poison hemlock? Please tell us where you read or heard it (including the quote, if possible).