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nephelinite

[nef-uh-luh-nahyt]
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noun Petrography.
  1. a fine-grained, dark rock of volcanic origin, essentially a basalt containing nepheline but no feldspar and little or no olivine.
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Origin of nephelinite

First recorded in 1860–65; nepheline + -ite1
Related formsneph·e·li·nit·ic [nef-uh-luh-nit-ik] /ˌnɛf ə ləˈnɪt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for nephelinite

Historical Examples

  • They are chiefly leucite and nepheline rocks, such as leucitite, leucitophyre and nephelinite, but basalt and trachyte also occur.

    Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2

    Various

British Dictionary definitions for nephelinite

nephelinite

noun
  1. a fine-grained basic laval rock consisting of pyroxene and nepheline
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012