| 词汇 | quartz |
| 释义 | quartz noun[ U ] uk /ˈkwɔːts/ us /ˈkwɔːrts/ a hard, transparent mineral substance, used in making electronic equipment and accurate watches and clocks石英 Kaye Varquez/EyeEm/GettyImages Watches & clocks 24-hour clock against the clockidiom alarm alarm clock at/on the stroke of somethingidiom atomic clock clock horology hour hand hourglass lose military time minute hand movement stroke timekeeper timepiece turn the clocks backphrase twenty-four-hour clock unsynchronized You can also find related words, phrases, and synonyms in the topics: Geology: types of rock quartz | American Dictionaryquartz noun[ U ] us/ˈkwɔrts/ a mineral (= hard substance formed naturally in the ground) used in making electronic equipment and watches and clocks Examples of quartzquartz A pure quartz reagent blank and several certified geological reference standards, as well as internal laboratory standards, were analysed with these samples. It is typically defined by the shapepreferred orientation of mica and elongated quartz grains. The vesicles are filled with calcite, chlorite, quartz and carbon. Furthermore, both the tube and the coil are surrounded by the tube cooling, which protects the quartz tube from overheating. The c. 25 m of purple, fine-grained sandstones below include quartz-arenitic intercalations and have an essentially calcareous matrix. Other alteration products are chlorite, sericite, quartz and opaque minerals. The newly crystallized quartz grains are characterized by elongate crystals oriented oblique to the shear band margins, defining a typical grain-shape foliation. The presence of quartz-filled microcracks in feldspar crystals suggests that deformation continued during cooling and crystallization. The features result from initial growth of the quartz grain, partial resorption (dissolution) during a period of disequilibrium, then further growth to form the mantle. The quartz ribbons display strong undulose extinction and locally well-developed core-and-mantle microstructures. The quartz aggregates show a crystallographic preferred orientation. Quartz-feldspar ribbons and aggregates define a mineral stretching lineation. These are infilled by aggregates of fibrous quartz and actinolite that are aligned parallel to the macroscopic mineral lineation. It is well cemented by microcrystalline quartz, and was the hardest of all samples to hammer in the field. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Collocations withquartzquartzThese are words often used in combination with quartz. Click on a collocation to see more examples of it. quartz crystal For this application the quartzcrystal plate is usually cut with a crystal orientation that minimises temperature coefficient around room temperature. quartz glass Damage-free operation using fused quartz glass as a better phase conjugation material could lead to the construction of a more compact, laser-diode-pumped, and all-solid-state laser system. quartz watch The introduction of the quartzwatch in 1969 was a revolutionary improvement in watch technology. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. See all collocations with quartz |
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