Dictionary![]() ![]() nic•o•tinePronunciation: (nik'u-tēn", -tin, nik"u-tēn'), [key] —n. Chem. a colorless, oily, water-soluble, highly toxic, liquid alkaloid, C10H14N2, found in tobacco and valued as an insecticide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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