pyrrhotine

World English Dictionary
pyrrhotite or pyrrhotine (ˈpɪrəˌtaɪt, ˈpɪrəˌtiːn, -ˌtaɪn, -tɪn)
 
n
a common bronze-coloured magnetic mineral consisting of ferrous sulphide in hexagonal crystalline form. Formula: FeS
 
[C19: from Greek purrhotēs redness, from purrhos fiery, from pur fire]
 
pyrrhotine or pyrrhotine
 
n
 
[C19: from Greek purrhotēs redness, from purrhos fiery, from pur fire]

Collins English Dictionary - Complete & Unabridged 10th Edition
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WordNet
pyrrhotine

noun
a brownish iron sulfide mineral (FeS) having weak magnetic properties [syn: pyrrhotite
WordNet® 3.0, © 2006 by Princeton University.
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