phonolite

phonolite Definition

pho·no·lite (fō′nə līt′)

noun

a fine-grained, extrusive igneous rock consisting chiefly of alkali feldspar and nepheline

Etymology: Fr phonolithe < phono- (see phono-) + -lithe (see -lite): transl. of Ger klingstein < klingen, to ring, clink + stein, stone

phonolite Related Forms

pho′·no·lit′ic (--lit′ik) adjective

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