Definition of bismuthite
: a nitrate of bismuth: such as a : the normal nitrate Bi(NO3)3.5H2O obtained as colorless lustrous hygroscopic crystals by the action of nitric acid on bismuth and used chiefly in making other bismuth compounds b : bismuth subnitrate
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Origin and Etymology of bismuthite
German bismutit, bismut bismuth + -it -ite
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