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Meaning of stishovite

stish•ov•ite

Pronunciation: (stish'u-vīt"), [key]
— n. Mineral.
  1. a rare polymorph of quartz, SiO, formed under very high pressure, as by meteorite impact. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.