conium

co·ni·um   (kō'nē-əm)    n.  The poison hemlock. [Late Latin cōnium, from Greek kōneion, probably from kōna, liquid pitch.]

Main Entry: co·ni·um
Pronunciation: kO-'nI-&m, 'kO-nE-
Function: noun
1 a capitalized : a genus of poisonous herbs (familyUmbelliferae) that have spotted stems, large divided leaves and white flowers and that include the poison hemlock b : a plant of the genus Conium
2 : thedried full-grown but unripe fruit of the poison hemlock containing coniine and its methyl derivative and used as a narcotic and sedative