Pôl'y-mîg'nîte, n.

(49), n. [Gr. πολὺς, many, and μίγνυμι, to mix.] (Min.) A black, opaque mineral, having a brilliant, almost metallic luster, and containing titanic acid, zirconia, lime, yttria, oxides of iron, cerium, and manganese, and traces of potash, magnesia, silica, and oxide of tin. Dana.