from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An anhydride formed by the removal of a water molecule from the hydroxyl and carboxyl radicals of hydroxy acids.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A cyclic intramolecular ester derived from a hydroxy acid.

from the GNU version of the Collaborative International Dictionary of English

  • n. One of a series of organic compounds, being cyclic esters which may be regarded as anhydrides of certain hydroxy acids. In general, they are colorless liquids, having a weak aromatic odor. They are so called because the typical lactone is derived from lactic acid.

from The Century Dictionary and Cyclopedia

  • n. A colorless volatile liquid possessing an aromatic smell, produced, along with lactide, by the dry distillation of lactic acid.


lact(o)- + -one.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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