The Collaborative International Dictionary
Leucopyrite
Leucopyrite \Leu*cop"y*rite\ (l[-u]*k[o^]p"[i^]*r[imac]t), n. [Leuco- + pyrites.] (Min.) A mineral of a color between white and steel-gray, with a metallic luster, and consisting chiefly of arsenic and iron.
Wiktionary
leucopyrite
n. (context mineralogy English) An alternate name for löllingite.