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chalcocite

[kal-kuh-sahyt] /ˈkæl kəˌsaɪt/
noun
1.
a common mineral, cuprous sulfide, Cu 2 S: an important ore of copper.
Origin of chalcocite
1865-1870
1865-70; irregular chalco- + (anthra)cite
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Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for chalcocite

chalcocite

/ˈkælkəˌsaɪt/
noun
1.
a lead-grey or black mineral, found as a copper ore or in veins. It is a source of copper. Composition: copper sulphide. Formula: Cu2S. Crystal structure: orthorhombic
Word Origin
C19: changed from earlier chalcosine, from Greek khalkos copper + -ite1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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