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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."
aldehyde al·de·hyde (āl'də-hīd')
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.