al·​de·​hyde | \ ˈal-də-ˌhīd How to pronounce aldehyde (audio) \

Definition of aldehyde

: acetaldehyde broadly : any of a class of highly reactive organic compounds that are analogous to acetaldehyde and characterized by a carbonyl group attached to a hydrogen atom

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Other Words from aldehyde

aldehydic \ ˌal-​də-​ˈhī-​dik How to pronounce aldehydic (audio) \ adjective

Examples of aldehyde in a Sentence

Recent Examples on the Web The aerosol contains potentially harmful chemicals, including nicotine, heavy metals, aldehydes, glycerin, and flavoring substances, researchers said. Martin Finucane,, "Dana Farber: Middle and high schoolers are getting exposed to more secondhand vape aerosols," 28 Aug. 2019 In this first study, the focus was on recognizing a group of chemicals, called aldehydes, that are often associated with fragrances but also human stress conditions and illnesses. Andrea Soltoggio, Smithsonian, "Artificial Intelligence May Be Able To Smell Illnesses in Human Breath," 12 June 2018 These organic compounds, called aldehydes, are found in citrus fruit rinds, as well as in off-the-shelf perfumes, including Chanel No. Kevin Schafer, National Geographic, "These Birds Make Their Own Citrus-Scented Cologne," 25 May 2018 The chief ones were from a class of chemicals called aldehydes, including heptanal, octanal, and nonanal. Warren Cornwall, Science | AAAS, "Malaria infection creates a ‘human perfume’ that makes us more attractive to mosquitoes," 16 Apr. 2018 The notes say that its note include aldehydes, almond milk, and incense. Kathleen Hou, The Cut, "This Eerily Beautiful French Perfume Smells Like the Feeling of Losing Your First Tooth," 7 July 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'aldehyde.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of aldehyde

1833, in the meaning defined above

History and Etymology for aldehyde

German Aldehyd, from New Latin al. dehyd., abbreviation of alcohol dehydrogenatum dehydrogenated alcohol

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Statistics for aldehyde

Time Traveler for aldehyde

The first known use of aldehyde was in 1833

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More Definitions for aldehyde


al·​de·​hyde | \ ˈal-də-ˌhīd How to pronounce aldehyde (audio) \

Medical Definition of aldehyde

: acetaldehyde broadly : any of various highly reactive compounds typified by acetaldehyde and characterized by the group CHO

Other Words from aldehyde

aldehydic \ ˌal-​də-​ˈhīd-​ik How to pronounce aldehydic (audio) \ adjective

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