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[al-duh-hahyd] /ˈæl dəˌhaɪd/
noun, Chemistry.
any of a class of organic compounds containing the group −CHO, which yields acids when oxidized and alcohols when reduced.
Origin of aldehyde
1840-50; < New Latin al(cohol) dehyd(rogenātum) dehydrogenated alcohol
Related forms
aldehydic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for aldehydic
Historical Examples
  • The reactions of cellulose certainly indicate that the CO- group is ketonic rather than aldehydic.

British Dictionary definitions for aldehydic


any organic compound containing the group -CHO. Aldehydes are oxidized to carboxylic acids and take part in many addition reactions
(modifier) consisting of, containing, or concerned with the group -CHO: aldehyde group or radical
Derived Forms
aldehydic (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
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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."

Online Etymology Dictionary, © 2010 Douglas Harper
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aldehydic in Medicine

aldehyde al·de·hyde (āl'də-hīd')

  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. See acetaldehyde.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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aldehydic in Science
Any of a class of highly reactive organic compounds obtained by oxidation of certain alcohols and containing the group CHO. Aldehydes are used in manufacturing resins, dyes, and organic acids.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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