Pȳr'o-chlōre, n.

n. [Gr. πῦρ, πυρός, fire, and χλωρός, pale green, or greenish-yellow.] (Min.) A mineral usually of a yellowish or brownish color, consisting chiefly of columbic acid, lime, and protoxide of cerium, and sometimes titanic acid with, or in place of, the columbic acid; — so called from its becoming grass-green on being subjected to heat under the blow-pipe. Dana.