Lactone
Pronunciation : Lac"tone
Part of Speech : n.
Definition : Defn: One of a series of organic compounds, 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.
(Chem.)
Source : Webster's Unabridged Dictionary, 1913