Lactone definitions

lăk'tōn'
A cyclic ester, or a compound containing a cyclic ester, formed by the intramolecular condensation of a hydroxy carboxylic acid.
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Any of a group of organic cyclic esters formed by the elimination of a molecule of water from the OH and COOH groups of a molecule of a hydroxy acid.
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Any of various organic esters derived from organic acids by removal of water. Lactones are formed when the carboxyl (COOH) group of the acid reacts with a hydroxyl (OH) group in the same acid, releasing water and causing the carbon atom to join to the hydroxyl's remaining oxygen atom, forming a ring. Vitamin C, the antibiotic erythromycin, and many commercially important substances are lactones.
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(organic chemistry) A cyclic intramolecular ester derived from a hydroxy acid.
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Origin of lactone

lact(o)– –one