• synonyms


[kwin-l-een, -in]
noun Chemistry.
  1. a colorless, liquid, water-immiscible, nitrogenous base, C9H7N, having a disagreeable odor, occurring in coal tar, and usually prepared by oxidizing a mixture of glycerol and aniline: used as a solvent and reagent and to make dyes.
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Origin of quinoline

First recorded in 1835–45; quin(ine) + -ol1 + -ine2
Also called leucoline.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for quinoline

Historical Examples of quinoline

  • The antipyretic medicines which we have first to consider are derivatives of quinoline.


    Raphael Meldola

  • When cinchonine is distilled with solid potassium hydrate, it yields pyrrol and bases of both the pyridine and quinoline series.

  • (d) The dye is thioflavine S., quinoline yellow, or one of their allies.

    The Manufacture of Paper

    Robert Walter Sindall

  • This is not exactly the case with the higher groups of alkaloids—the derivatives of pyridine and quinoline.

  • Most of these are of a basic character, and belong to the pyridine and the quinoline series.

British Dictionary definitions for quinoline


  1. an oily colourless insoluble basic heterocyclic compound synthesized by heating aniline, nitrobenzene, glycerol, and sulphuric acid: used as a food preservative and in the manufacture of dyes and antiseptics. Formula: C 9 H 7 N
  2. any substituted derivative of quinoline
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

quinoline in Medicine


(kwĭnə-lēn′, -lĭn)
  1. An aromatic organic base synthesized or obtained from coal tar and used as a food preservative and in making antiseptics.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

quinoline in Science


[kwĭnə-lēn′, -lĭn]
  1. An aromatic organic liquid having a pungent, tarlike odor. Quinoline is a base and is obtained from coal tar or is synthesized. It is used as a food preservative and in making antiseptics and dyes. Chemical formula: C9H7N.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.