n. [ L. haematites, Gr. &unr_; bloodlike, fr. a"i^ma, a"i`matos, blood. ] (Min.) An important ore of iron, the sesquioxide, so called because of the red color of the powder. It occurs in splendent rhombohedral crystals, and in massive and earthy forms; -- the last called red ocher. Called also specular iron, oligist iron, rhombohedral iron ore, and bloodstone. See Brown hematite, under Brown. [ 1913 Webster ]