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)