nephelinite Hear it!

nephelinite definition

neph·elin·ite (nef′ə lin īt′)

noun

a grayish, fine-grained or porphyritic igneous rock composed mainly of nepheline and pyroxene

Etymology: < nepheline + -ite

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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