orthoclase

[ awr-thuh-kleys, -kleyz ]

/ ˈɔr θəˌkleɪs, -ˌkleɪz /

noun

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.

Origin of orthoclase

1840–50; ortho- + -clase<Greek klásis cleavage, breaking

Words nearby orthoclase

orthocenter, orthocentre, orthocephalic, orthochorea, orthochromatic, orthoclase, orthoclastic, ortho-cousin, orthocytosis, ortho-dichlorobenzene, orthodontia

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for orthoclase

If the initial composition of the magma is represented by a point between the two eutectic points, orthoclase will separate first.
The Phase Rule and Its Applications|Alexander Findlay
The particular feldspar that furnishes most of the moonstone is orthoclase, a silicate of potassium and aluminum.
A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public|Frank Bertram Wade
Amelia Court House, Virginia, is another locality whence come pieces either of orthoclase or oligoclase exhibiting this property.
Birds and Nature, Vol. 12 No. 2 [July 1902]|Various
Minettes contain biotite and orthoclase; kersantites, biotite and plagioclase.
Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 2|Various

Examples of substances exhibiting these three kinds of dispersion are borax, orthoclase and gypsum respectively.
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7|Various

British Dictionary definitions for orthoclase

orthoclase

/ (ˈɔːθəʊˌkleɪs, -ˌkleɪz) /

noun

a white to pale yellow, red, or green mineral of the feldspar group, found in igneous, sedimentary, and metamorphic rocks. It is used in the manufacture of glass and ceramics. Composition: potassium aluminium silicate. Formula: KAlSi 3 O 8 . Crystal structure: monoclinic

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for orthoclase

orthoclase

[ ôr′thə-klās′ ]

A white to yellowish red monoclinic mineral of the potassium feldspar group that forms from medium- to low-temperature magmas. Chemical formula: KAlSi3O8.

单词	orthoclase
释义	orthoclase [ awr-thuh-kleys, -kleyz ] / ˈɔr θəˌkleɪs, -ˌkleɪz / noun 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. Origin of orthoclase 1840–50; ortho- + -clase<Greek klásis cleavage, breaking Words nearby orthoclase orthocenter, orthocentre, orthocephalic, orthochorea, orthochromatic, orthoclase, orthoclastic, ortho-cousin, orthocytosis, ortho-dichlorobenzene, orthodontia Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for orthoclase If the initial composition of the magma is represented by a point between the two eutectic points, orthoclase will separate first. The Phase Rule and Its Applications\|Alexander Findlay The particular feldspar that furnishes most of the moonstone is orthoclase, a silicate of potassium and aluminum. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public\|Frank Bertram Wade Amelia Court House, Virginia, is another locality whence come pieces either of orthoclase or oligoclase exhibiting this property. Birds and Nature, Vol. 12 No. 2 [July 1902]\|Various Minettes contain biotite and orthoclase; kersantites, biotite and plagioclase. Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 2\|Various Examples of substances exhibiting these three kinds of dispersion are borax, orthoclase and gypsum respectively. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7\|Various British Dictionary definitions for orthoclase orthoclase / (ˈɔːθəʊˌkleɪs, -ˌkleɪz) / noun a white to pale yellow, red, or green mineral of the feldspar group, found in igneous, sedimentary, and metamorphic rocks. It is used in the manufacture of glass and ceramics. Composition: potassium aluminium silicate. Formula: KAlSi 3 O 8 . Crystal structure: monoclinic Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for orthoclase orthoclase [ ôr′thə-klās′ ] A white to yellowish red monoclinic mineral of the potassium feldspar group that forms from medium- to low-temperature magmas. Chemical formula: KAlSi3O8. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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