Artificial intelligent assistant

pyrity

ˈpyrity, a. Obs.
  [f. pyrite + -y.]
  Containing pyrite or pyrites.

1757 tr. Henckel's Pyritol. 175 Small or poor ores, which are commonly quartzy, mock-leady, and pyrity. Ibid. 302 Neither pyrity nor vitriolic.

Oxford English Dictionary

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