from
The Collaborative International Dictionary of English v.0.48
Conium \Co*ni"um\ (? or ?), n. [NL., fr. Gr. ? hemlock.]
1. (Bot.) A genus of biennial, poisonous, white-flowered,
umbelliferous plants, bearing ribbed fruit ("seeds") and
decompound leaves.
[1913 Webster]
2. (Med.) The common hemlock ({Conium maculatum}, poison
hemlock, spotted hemlock, poison parsley), a roadside weed
of Europe, Asia, and America, cultivated in the United
States for medicinal purpose. It is an active poison. The
leaves and fruit are used in medicine.
[1913 Webster]