Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A yellow or yellowish-green mineral, essentially WO3, often occurring with tungsten ores.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An orthorhombic hydrous tungsten oxide mineral formed by the weathering of other tungsten-containing minerals.

from the GNU version of the Collaborative International Dictionary of English

  • n. The oxide of tungsten, a yellow mineral occurring in a pulverulent form. It is often associated with wolfram.

from The Century Dictionary and Cyclopedia

  • n. Native oxid of tungsten, occurring in pulverulent form, of a bright-yellow color, usually in connection with wolfram, the tungstate of iron and manganese. Also called tungstic ocher.

Etymologies

tungsten +‎ -ite (Wiktionary)

Examples

  • In some tungsten deposits a hydrated oxide called tungstite has been formed as a canary-yellow coating at the surface.

    The Economic Aspect of Geology

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