Nicotine definition

nĭkə-tēn
A colorless, poisonous alkaloid, C10 H14 N2 , derived from the tobacco plant and used as an insecticide. It is the substance in tobacco to which smokers can become addicted.
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A toxic, addictive, water-soluble alkaloid, C10H14N2, found in tobacco leaves.
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A toxic alkaloid, C10 H14 N2 , that is found in the tobacco plant, constitutes the primary addictive substance in tobacco products, and acts as a stimulant at low doses.
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A colorless, poisonous compound occurring naturally in the tobacco plant. It is used in medicine and as an insecticide, and it is the substance in tobacco products to which smokers can become addicted. Nicotine is an alkaloid. Chemical formula: C10H14N2.
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(chemistry) An alkaloid (C10H14N2), commonly occurring in the tobacco plant. In small doses it is a habit-forming stimulant; in larger doses it is toxic and is often used in insecticides.
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Other Word Forms

Noun

Singular:
nicotine
Plural:
nicotines

Origin of nicotine

  • French from New Latin nicotiāna nicotiana

    From American Heritage Dictionary of the English Language, 5th Edition

  • Borrowing from French nicotine, named after Jean Nicot, French ambassador to Portugal, who sent tobacco seeds back to France in 1561.

    From Wiktionary