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See more synonyms for aldehyde on Thesaurus.com
noun Chemistry.
  1. any of a class of organic compounds containing the group −CHO, which yields acids when oxidized and alcohols when reduced.
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Origin of aldehyde

1840–50; < New Latin al(cohol) dehyd(rogenātum) dehydrogenated alcohol
Related formsal·de·hy·dic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for aldehydic

Historical Examples

  • The reactions of cellulose certainly indicate that the CO- group is ketonic rather than aldehydic.

    Researches on Cellulose

    C. F. Cross

British Dictionary definitions for aldehydic


  1. any organic compound containing the group -CHO. Aldehydes are oxidized to carboxylic acids and take part in many addition reactions
  2. (modifier) consisting of, containing, or concerned with the group -CHOaldehyde group or radical
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Derived Formsaldehydic (ˌældəˈhɪdɪk), adjective

Word Origin

C19: from New Latin al (cohol) dehyd (rogenātum) dehydrogenated alcohol
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

Word Origin and History for aldehydic



first oxidation product of alcohol, 1833, discovered in 1774 by German-born Swedish chemist Carl Wilhelm Scheele (1742-1786), the name said to have been coined by German chemist Justus von Liebig (1803-1873) from abbreviation of Modern Latin alcohol dehydrogenatum "dehydrogenated alcohol."

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Online Etymology Dictionary, © 2010 Douglas Harper

aldehydic in Medicine


  1. Any of a class of reactive organic chemical compounds obtained by oxidation of primary alcohols, characterized by the common group CHO, and used in the manufacture of resins, dyes, and organic acids.
  2. acetaldehyde

aldehydic in Science