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Definition of: lactone
(lak′tōn) noun Chem.
One of a class of organic anhydrides in which the molecule of water is derived from hydroxyl and carboxyl, both contained in the same radical, with the etherification in the same radical, with the etherification of the acid part by the alcoholic part. [<LACT- + -ONE]
—lac·ton·ic (lak·ton′ik) adjective
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