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quartz

[kwawrts] /kwɔrts/
noun
1.
one of the commonest minerals, silicon dioxide, SiO 2 , having many varieties that differ in color, luster, etc., and occurring either in masses (as agate, bloodstone, chalcedony, jasper, etc.) or in crystals (as rock crystal, amethyst, citrine, etc.): the chief constituent of sand and sandstone, and an important constituent of many other rocks. It is piezoelectric and used to control the frequencies of radio transmitters.
Origin of quartz
1750-1760
1750-60; < German Quarz
Related forms
quartzose
[kwawrt-sohs] /ˈkwɔrt soʊs/ (Show IPA),
quartzous
[kwawrt-suh s] /ˈkwɔrt səs/ (Show IPA),
adjective
Can be confused
quarts, quartz.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for quartz
Contemporary Examples
Historical Examples
  • And one must crush mountains of quartz and wash hills of sand to get it.

    A Year in the Fields John Burroughs
  • The minerals at contact are quartz, biotite, magnetite and hornblende.

    The Long Labrador Trail Dillon Wallace
  • There's a fine vein of quartz to develop, expensive machinery to install.

    North of Fifty-Three Bertrand W. Sinclair
  • Sometimes the quartz is so soft that it may easily be loosened with the pick.

  • The resulting platinum deposit adheres very strongly to the quartz, and may be soldered to as before.

    On Laboratory Arts Richard Threlfall
  • The mule is started, and in four or five hours the quartz is pulverized.

British Dictionary definitions for quartz

quartz

/kwɔːts/
noun
1.
a colourless mineral often tinted by impurities, found in igneous, sedimentary, and metamorphic rocks. It is used in the manufacture of glass, abrasives, and cement, and also as a gemstone; the violet-purple variety is amethyst, the brown variety is cairngorm, the yellow variety is citrine, and the pink variety is rose quartz. Composition: silicon dioxide. Formula: SiO2. Crystal structure: hexagonal
2.
short for quartz glass
Word Origin
C18: from German Quarz, of Slavic origin
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
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Word Origin and History for quartz
n.

"silicon dioxide," 1756, from German Quarz, Zwarc "rock crystal," from Middle High German twarc, probably from a West Slavic source, cf. Czech tvrdy, Polish twardy "quartz," noun uses of an adjective meaning "hard," from Old Church Slavonic tvrudu "hard," from Proto-Slavic *tvrd-, from PIE *(s)twer- "to grasp, hold; hard."

Online Etymology Dictionary, © 2010 Douglas Harper
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quartz in Medicine

quartz (kwôrts)
n.
A very hard crystalline form of silicon dioxide used in chemical apparatus and in optical and electric instruments.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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quartz in Science
quartz
  (kwôrts)   
A hard, transparent trigonal mineral that, after feldspar, is the most common mineral on the surface of the Earth. It occurs as a component of igneous, metamorphic, and sedimentary rocks as well as in a variety of other forms such as rock crystal, flint, and agate. Some crystalline forms, such as amethyst, are considered gemstones. Chemical formula: SiO2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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