| 单词 | silica |
| 释义 | silica (once / 4223 pages) n WORD FAMILY silica: silicas, siliceous, silicious USAGE EXAMPLESAnd volcanoes rich in silica like Paektu, which tend to have chunky, viscous magmas, seem to hold a lot of gas. Science Magazine(Nov 30, 2016) County officials have said the exposure to silica sand in the air from mining operations is a low health risk. Washington Times(Nov 17, 2016) PPG’s Westlake facility treats silicas - a hard mineral found in rock - for use in industrial and consumer applications, such as tire manufacturing and footwear. Washington Times(Oct 20, 2016) n a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite Syn|Hypo|Hyper silicon dioxide, silicon oxide chert variety of silica containing microcrystalline quartz flinta hard kind of stone; a form of silica more opaque than chalcedony silexa pure form of finely ground silica gunflintthe piece of flint that provides the igniting spark in a flintlock weapon taconitea variety of chert containing magnetite and hematite; mined as a low-grade iron ore firestonea piece of flint that is struck to light a fire flintstonepebbles of flint used in masonry construction oxide any compound of oxygen with another element or a radical |
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