hydroquinones
plural of hydroquinone
Source: Wiktionary
Hy`dro*qui"none, n. Etym: [Hydro-, 2 + quinone.] (Chem.)
Definition: A white crystalline substance, C6H4(OH)2, obtained by the reduction of quinone. It is a diacid phenol, resembling, and metameric with, pyrocatechin and resorcin. Called also dihydroxy benzene.
Source: Webster’s Unabridged Dictionary 1913 Edition
19 October 2024
(noun) any of a group of herpes viruses that enlarge epithelial cells and can cause birth defects; can affect humans with impaired immunological systems
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.
