Orthoclase Or"tho*clase, n. [Ortho- + Gr. ? to break.] (Min.) Common or potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other. See {Feldspar}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • Orthoclase — General Category Silicate mineral Chemical formula KAlSi3O8 …   Wikipedia

  • orthoclase — [ôr′thō klās΄, ôr′thōklāz΄; ôr′thəklās΄, ôr′thəklāz΄] n. [Ger orthoklas < Gr orthos (see ORTHO ) + klasis, fracture (< klan, to break: see CLASTIC), because of the 90° cleavage] a monoclinic feldspar, KAlSi3O8, that is dimorphic with… …   English World dictionary

  • orthoclase — /awr theuh klays , klayz /, n. a common white or pink mineral of the feldspar group, KAlSi3O8, having two good cleavages at right angles, and found in silica rich igneous rocks: used in the manufacture of porcelain. [1840 50; ORTHO + clase < Gk… …   Universalium

  • Orthoclase — Orthose Orthose Catégorie IX : silicates Orthose et quartz Généra …   Wikipédia en Français

  • orthoclase — noun Potassium aluminum silicate, KAlSiO, 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 …   Wiktionary

  • orthoclase — ortoklazas statusas T sritis chemija apibrėžtis Mineralas. formulė K[AlSi₃O₈] atitikmenys: angl. orthoclase rus. ортоклаз …   Chemijos terminų aiškinamasis žodynas

  • orthoclase — noun Etymology: German Orthoklas, from orth + Greek klasis breaking, from klan to break more at clast Date: 1849 a monoclinic mineral of the feldspar group consisting of a silicate of potassium and aluminum …   New Collegiate Dictionary

  • orthoclase — [ ɔ:θəkleɪz] noun a potassium rich mineral of the feldspar group, typically white or pink. Origin C19: from ortho + Gk klasis breaking (because of the characteristic two cleavages at right angles) …   English new terms dictionary

  • orthoclase — n. Potash felspar, orthose, prismatic felspar, felspar …   New dictionary of synonyms

  • orthoclase — or·tho·clase …   English syllables

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