obscuration (countable and uncountable, plural obscurations)
The state of being obscured.
A unit of measurement used in particular for smoke detectors which respond to absorption of light by smoke, in percent absorption per unit length, e.g. % obs/ft, % obs/m.
Source: Wiktionary
Ob`scu*ra"tion, n. Etym: [L. obscurativ: cf.F. obscuration. See Obscure, v. t. ]
Definition: The act or operation of obscuring; the state of being obscured; as, the obscuration of the moon in an eclipse. Sir J. Herschel.
Source: Webster’s Unabridged Dictionary 1913 Edition
13 March 2025
(adjective) conforming exactly or almost exactly to fact or to a standard or performing with total accuracy; “an accurate reproduction”; “the accounting was accurate”; “accurate measurements”; “an accurate scale”
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.
