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stishovite

[ stish-uh-vahyt ]
/ ˈstɪʃ əˌvaɪt /
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noun Mineralogy.
a rare polymorph of quartz, SiO2, formed under very high pressure, as by meteorite impact.
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Which of the following nouns has an irregular plural form?
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Origin of stishovite

1960–65; named after S. M. Stishov, 20th-century Russian mineralogist; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
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