Pro"pi*dene, n. Etym: [Propyl + ethylidene.] (Chem.)
Definition: The unsymmetrical hypothetical hydrocarbon radical, CH3.CH2.CH, analogous to ethylidene, and regarded as the type of certain derivatives of propane; -- called also propylidene.
Source: Webster’s Unabridged Dictionary 1913 Edition
14 June 2025
(noun) a member of a learned society; “he was elected a fellow of the American Physiological Association”
The first coffee-house in Mecca dates back to the 1510s. The beverage was in Turkey by the 1530s. It appeared in Europe circa 1515-1519 and was introduced to England by 1650. By 1675 the country had more than 3,000 coffee houses, and coffee had replaced beer as a breakfast drink.
