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tungstite

[tuhng-stahyt]
noun
  1. a yellow or yellowish-green mineral, tungsten trioxide, WO3, usually occurring in a pulverulent form.
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Origin of tungstite

First recorded in 1865–70; tungst(en) + -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for tungstite

tungstite

noun
  1. a yellow earthy rare secondary mineral that consists of tungsten oxide and occurs with tungsten ores. Formula: WO 3
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Word Origin

C20: from tungst (en) + -ite 1
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