noun plum·bo·niobite \"+\

Definition of plumboniobite

  1. :  a niobite of complex composition resembling samarskite but containing lead and found in dark brown to black masses in pegmatite veins or massive slate

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Origin and Etymology of plumboniobite

German plumboniobit, from plumb- + niobit niobite

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a brief usually trivial fact

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