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Webster 1913 Edition

Noun.

[Named after Dominico

Troili

, an Italian of the 18th century.]

(Min.)

Native iron protosulphide,

FeS

. It is known only in meteoric irons, and is usually in imbedded nodular masses of a bronze color.

troilite ‎(plural troilites)

(mineralogy) A non-magnetic variety of the ferrous sulfide mineral pyrrhotite that occurs in most meteorites