thionine (countable and uncountable, plural thionines)
(chemistry) An artificial red or violet dyestuff consisting of a complex sulfur derivative of certain aromatic diamines.
(organic compound) The unsaturated nine-membered heterocycle having eight carbon atoms, one sulfur atom and four double bonds.
• phenylene violet
Source: Wiktionary
Thi"on*ine, n. Etym: [Gr. (Chem.)
Definition: An artificial red or violet dyestuff consisting of a complex sulphur derivative of certain aromatic diamines, and obtained as a dark crystalline powder; -- called also phenylene violet.
Source: Webster’s Unabridged Dictionary 1913 Edition
7 June 2025
(noun) a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years
The earliest credible evidence of coffee-drinking as the modern beverage appeared in modern-day Yemen. In the middle of the 15th century in Sufi shrines where coffee seeds were first roasted and brewed for drinking. The Yemenis procured the coffee beans from the Ethiopian Highlands.
