a mineral, bismuth sulfide, Bi2S3, occurring in lead-gray masses: an ore of bismuth.
- Also called bismuth glance .
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British Dictionary definitions for bismuthinite
a grey mineral consisting of bismuth sulphide in orthorhombic crystalline form. It occurs in veins associated with tin, copper, silver, lead, etc, and is a source of bismuth. Formula: Bi 2 S 3
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