carbonyl
car.bon.yl \'ka:r-b*-.nil, -.ne-l\ \.ka:r-b*-'nil-ik\ n 1: a bivalent radical CO occurring in aldehydes, ketones, carboxylic acids, esters, acid halides, and amides 2: a compound of the carbonyl radical with a metal - car.bon.yl.ic aj
Webster's English Dictionarycar.bon.yl \'ka:r-b*-.nil, -.ne-l\ \.ka:r-b*-'nil-ik\ n 1: a bivalent radical CO occurring in aldehydes, ketones, carboxylic acids, esters, acid halides, and amides 2: a compound of the carbonyl radical with a metal - car.bon.yl.ic aj