• synonyms


[yoo-juh-nawl, -nohl]
noun Chemistry, Pharmacology.
  1. a colorless, oily, spicy, aromatic, very slightly water-soluble liquid, C10H12O2, extracted from certain essential oils, as oil of cloves: used chiefly in perfumery and in dentistry as an antiseptic.
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Origin of eugenol

1885–90; < New Latin Eugen(ia) name of genus of trees (after Prince Eugène of Savoy; see -ia) + -ol2
Also called eugenic acid.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for eugenol

Historical Examples

  • Eugenol, or eugenic acid, C10H12O2, is the chief constituent.

    Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5


  • The principal constituent of the oil is eugenol, together with caryophyllene and acet-eugenol.

  • While within certain limits the value of this oil is determined by its eugenol content, oils containing more than 93 per cent.

  • Oeillet is a combination possessed of a sweet carnation-like odour and having as a basis, eugenol or isoeugenol.

  • In Germany commercial vanilla is now largely prepared from eugenol, a constituent of oil of cloves.

British Dictionary definitions for eugenol


  1. a colourless or pale yellow oily liquid substance with a spicy taste and an odour of cloves, used in perfumery; 4-allyl-2-methoxyphenol. Formula: C 10 H 12 O 2
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Word Origin

C19: eugen-, from Eugenia caryophyllata kind of clove from which oil may be obtained + -ol 1
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

eugenol in Medicine


(yōōjə-nôl′, -nōl′)
  1. An aromatic liquid made from clove oil, used as a dental analgesic.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.