单词 | quartz |
释义 | quartz[ kwawrts ] / kwɔrts / nounone of the commonest minerals, silicon dioxide, SiO2, 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 quartzFirst recorded in 1750–60, quartz is from the German word Quarz OTHER WORDS FROM quartzquartz·ose [kwawrt-sohs], /ˈkwɔrt soʊs/, quartz·ous [kwawrt-suhs], /ˈkwɔrt səs/, adjectiveWORDS THAT MAY BE CONFUSED WITH quartzquarts, quartzWords nearby quartzquarter-wave plate, quartet, quartic, quartile, quarto, quartz, quartz clock, quartz crystal, quartz glass, quartziferous, quartz-iodine lamp Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for quartzBritish Dictionary definitions for quartzquartz / (kwɔːts) / nouna 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: SiO 2 . Crystal structure: hexagonal short for quartz glass Word Origin for quartzC18: 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 Medical definitions for quartzquartz [ 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. Scientific definitions for quartzquartz [ 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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