orthoclase
(noun) a white or colored monoclinic feldspar
Source: WordNet® 3.1
orthoclase (countable and uncountable, plural orthoclases)
(mineral) Potassium aluminum silicate, KAlSi3O8, a common feldspar of igneous, plutonic, and metamorphic rocks. Orthoclase is the main feldspar of pegmatite occurrences, where it is most commonly flesh-colored. Orthoclase is used in the ceramic and glass industries and as a decorative gravel.
Source: Wiktionary
Or"tho*clase, n. Etym: [Ortho- + Gr. (Min.)
Definition: Common or potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other. See Feldspar.
Source: Webster’s Unabridged Dictionary 1913 Edition
6 October 2024
(adjective) of such great duration as to preclude the possibility of being assigned a date; “dateless customs”
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.
