Ketone: Ketone, any of a class of organic compounds characterized by the presence of a carbonyl group in which the carbon atom is covalently bonded to an oxygen atom. The remaining two bonds are to other carbon atoms or hydrocarbon radicals (R): Alcohols may be oxidized to give aldehydes, ketones, and carboxylic acids.
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The British word for a sweater. In the United States, a jumper is a kind of dress or coverall. In the Harry Potter books, Mrs. Weasley makes jumpers for her children. by lesgles March 22, 2005.