troilite

noun
troi·​lite | \ˈtrō-ə-ˌlīt, ˈtrȯi-ˌlīt\

Definition of troilite 

: a mineral that is a variety of pyrrhotite and that is widely but sparsely distributed (as on earth, in meteorites, and in lunar soil samples)

First Known Use of troilite

circa 1868, in the meaning defined above

History and Etymology for troilite

German Troilit, from Domenico Troili, 18th century Italian scientist + German -it -ite

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The first known use of troilite was circa 1868

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