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Webster 1913 Edition

(tŭng′stīt)

Noun.

(Min.)

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

tungstite ‎(usually uncountable, plural tungstites)

(mineralogy) An orthorhombic hydrous tungsten oxide mineral formed by the weathering of other tungsten-containing minerals.

mineral