Meaning of aldehyde in English:


Pronunciation /ˈaldɪhʌɪd/


  • An organic compound containing the group —CHO, formed by the oxidation of alcohols. Typical aldehydes include methanal (formaldehyde) and ethanal (acetaldehyde).

    ‘Water, ethanol, volatile organic acids, aldehydes, esters, acetals, and ketones, many of them powerfully aromatic, are among the azeotrope components in wines.’
    • ‘Included among these compounds are some of the best known of all chemical families, including the hydrocarbons, alcohols, ethers, aldehydes and ketones, and organic acids.’
    • ‘Over time, however, it oxidizes and chemically degrades to form alcohols, ketones, aldehydes, acids and esters.’
    • ‘Oxidation of an aldehyde breaks the double bond within the carbonyl group to give a carboxylic acid.’
    • ‘The fumes also contain sulfur dioxide, and various aldehydes, primarily formaldehyde as well as acetaldehyde and acrolein.’


Mid 19th century shortened from Latin alcohol dehydrogenatum ‘alcohol deprived of hydrogen’.