The expression “coffee break” was first attested in 1952 in glossy magazine advertisements by the Pan-American Coffee Bureau.
LACTONE
Noun
lactone (plural lactones)
(organic chemistry) A cyclic intramolecular ester derived from a hydroxy acid.
Usage notes
• Greek prefixes indicate the ring size e.g. α- 3-membered, β- 4-membered
Anagrams
• octenal
Source: Wiktionary
Lac"tone, n. (Chem.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition
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