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car·bon·yl 'kär-bə-.nil, -.nēl n an organic functional group CO occurring in aldehydes, ketones, carboxylic acids, esters, and their derivatives
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car·bon·yl (kahrґbə-nəl) [carbon + Gr. hylē matter] the divalent group C
O, occurring in compounds such as aldehydes, ketones, carboxylic acids, and esters.
Medical dictionary. 2011.