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Webster 1913 Edition
Pyrochlore
Pyr′o-chlore
,Noun.
[
Pyro-
+ Gr. [GREEK] 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.