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nephelinite

[ nef-uh-luh-nahyt ]

noun

, Petrography.
  1. a fine-grained, dark rock of volcanic origin, essentially a basalt containing nepheline but no feldspar and little or no olivine.


nephelinite

/ ˈnɛfɪlɪˌnaɪt /

noun

  1. a fine-grained basic laval rock consisting of pyroxene and nepheline
“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


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Other Words From

  • neph·e·li·nit·ic [nef-, uh, -l, uh, -, nit, -ik], adjective
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Word History and Origins

Origin of nephelinite1

First recorded in 1860–65; nepheline + -ite 1
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Example Sentences

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

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