Artificial intelligent assistant

hedyphane

hedyphane Min.
  (ˈhɛdɪfeɪn)
  [Named Hedyphan by Breithaupt, 1830, f. Gr. ἡδύς sweet + -ϕανής appearing (cf. Gr. ἡδυϕαής sweet-shining) in reference to its brilliant lustre.]
  A colourless variety of mimetite, containing calcium; a variety of green lead ore.

1832 C. U. Shepard Min. 222 Hedyphane. 1852 Brooke & Miller Min. 483 Breithaupt's hedyphane is a massive variety of mimetite.

Oxford English Dictionary

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