ketone - any of a class of organic compounds having a carbonyl group linked to a carbon atom in each of two hydrocarbon radicals

acetoacetic acid - unstable acid found in abnormal amounts in the blood and urine n some cases of impaired metabolism (as diabetes mellitus or starvation)

beta-hydroxybutyric acid - beta derivative of hydroxybutyric acid that is found in the blood and urine in some cases of impaired metabolism