AN'ATASE, noun [Gr. 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 crystallized in acute, elongated, pyramidical octahedrons.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI