'Pyrochlore' definitions:

Definition of 'Pyrochlore'

From: GCIDE

Pyrochlore \Pyr"o*chlore\, n. [Pyro- + Gr. ? pale green.] (Min.) A niobate of calcium, cerium, and other bases, occurring usually in octahedrons of a yellowish or brownish color and resinous luster; -- so called from its becoming grass-green on being subjected to heat under the blowpipe. [1913 Webster]