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Meaning of nephelinite

neph•e•lin•ite

Pronunciation: (nef'u-lu-nīt"), [key]
— n. Petrog.
  1. a fine-grained, dark rock of volcanic origin, essentially a basalt containing nepheline but no feldspar and little or no olivine.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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