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pyrrhotite

[pir-uh-tahyt] /ˈpɪr əˌtaɪt/
noun
1.
a common mineral, iron sulfide, approximately FeS but variable because of a partial absence of ferrous ions, occurring in massive and in crystal forms with a bronze color and metallic luster; magnetic pyrites: generally slightly magnetic.
Origin
1868
1868; < Greek pyrrhót(ēs) redness + -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for pyrrhotite

pyrrhotite

/ˈpɪrəˌtaɪt/
noun
1.
a common bronze-coloured magnetic mineral consisting of ferrous sulphide in hexagonal crystalline form. Formula: FeS
Word Origin
C19: from Greek purrhotēs redness, from purrhos fiery, from pur fire
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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