[ noun ] a silver-white or grey ore of arsenic <noun.substance>
Mispickel \Mis*pick"el\, n. [G.] (Min.) Arsenical iron pyrites; arsenopyrite.
Arsenopyrite \Ar`sen*o*pyr"ite\, n. [Arsenic + pyrite.] (Min.) A mineral of a tin-white color and metallic luster, containing arsenic, sulphur, and iron; -- also called {arsenical pyrites} and {mispickel}.