Bornite Definition
 bôrnīt 
    noun
  
 A reddish-brown, soft, brittle, cubic mineral, copper iron sulfide, Cu5FeS4, an ore of copper that tarnishes to a dark purplish color when it is fractured.
 Webster's New World 
Synonyms: 
  Other Word Forms of Bornite
Noun
Singular:
 bornitePlural:
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