D defs.my
Entry 1 sense Webster, 1913

Arsenopyrite

· Ar·sen·o·pyr·ite · IPA
01 n. A mineral of a tin-white color and metallic luster, containing arsenic, sulphur, and iron; -- also called arsenical pyrites and mispickel.
  1. 1.
    A mineral of a tin-white color and metallic luster, containing arsenic, sulphur, and iron; -- also called arsenical pyrites and mispickel.(Min.) Also: arsenical pyrites, mispickel