Hypertext Webster Gateway: "nicotine"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Nicotine \Nic"o*tine\ (? or ?), n. [F. nicotine. See
{Nicotian}.] (Chem.)
An alkaloid which is the active principle of tobacco. It is a
colorless, transparent, oily liquid, having an acrid odor,
and an acrid burning taste. It is intensely poisonous. --Ure.
From WordNet (r) 1.7 (wn)
nicotine
n : an alkaloid poison that occurs in tobacco; used in medicine
and as an insecticide
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