ORTHOCLASE

orthoclase

(noun) a white or colored monoclinic feldspar

Source: WordNet® 3.1


Etymology

Noun

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



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