• WordNet 3.6
    • n Conium small genus of highly toxic biennials: hemlock
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Webster's Revised Unabridged Dictionary
    • Conium (Bot) A genus of biennial, poisonous, white-flowered, umbelliferous plants, bearing ribbed fruit (“seeds”) and decompound leaves.
    • Conium (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.
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Century Dictionary and Cyclopedia
    • n conium A genus of umbelliferous plants, consisting of tall glabrous biennial herbs, with compound leaves and white-flowered umbels. The principal species, C. maculatum, is a native of Europe and Asia, and widely naturalized in North America; it is the hemlock of the ancients, used by the Greeks as a poison by which condemned persons were put to death. The active principle is a colorless, oily, alkaline fluid, called conine (which see). The plant has been much used and esteemed in medicine as an alterative and sedative.
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Webster's Revised Unabridged Dictionary
NL., fr. Gr. hemlock


In literature:

Conium (Hemlock) Same as for aconite.
"The Miracle Mongers, an Exposé" by Harry Houdini
In this family is found the poison hemlock (Conium) used by the ancient Greeks for the elimination of politicians.
"Scientific American Supplement, No. 829, November 21, 1891" by Various
"The Manual of the Botany of the Northern United States" by Asa Gray