Conium /(? [or] )/

Co·ni·um

Conium

n.
  1. A genus of biennial, poisonous, white-flowered, umbelliferous plants, bearing ribbed fruit (“seeds”) and decompound leaves. (Bot.)
  2. 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. (Med.)