Ăn'a-tāse, n.

n. [Gr. ἀνάτασις, extension, so named from the length of its crystals, from ἀνατείνειν, to stretch up, from ἀνά, up, and τείνειν, to stretch.] (Min.) A native oxide of titanium (also called octahedrite), occurring in brilliant octahedral crystals, of a brown or somewhat bluish color. Dana.