Artificial intelligent assistant

pyrrhotine

pyrrhotine Min.
  (ˈpɪrətaɪn)
  [Named 1835 f. Gr. πυρρότης redness + -ine5.]
  = pyrrhotite.

1849 J. Nicol Min. 452 Pyrrhotine, Breithaupt; magnetic iron pyrites. 1881 Metal World No. 21. 323 The ore of the Gap Mine is..a nickeliferous pyrrhotine,..and is extremely difficult to work.

Oxford English Dictionary

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