Emily Dickinson Lexicon

AN'A-TASE, n. [Gr. ανατασις, extension, so named from the length of its crystals.]

Octahedrite; octahedral oxyd of titanium; a mineral that shows a variety of colors by reflected light, from indigo blue to reddish brown. It is usually crystalized in acute, elongated, pyramidical octahedrons. – Ure. Cleaveland.