Definition of penroseite in English:

penroseite

noun

Mineralogy
  • A rare grey mineral of the cubic crystal system which consists of nickel selenide, NiSe₂ (usually with some cobalt and copper), and occurs as reniform masses.

Origin

1920s. From the name of Richard A. Penrose, Jr, U.S. mining geologist + -ite.

Pronunciation

penroseite

/ˈpɛnrəʊzʌɪt/