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dunite

[doo-nahyt, duhn-ahyt]
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noun
  1. a coarse-grained igneous rock composed almost entirely of olivine.
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Origin of dunite

1865–70; named after Mt. Dun in New Zealand, where it is found; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for dunite

dunite

noun
  1. an ultrabasic igneous rock consisting mainly of olivine
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Word Origin

C19: named after Dun Mountain, a mountain in New Zealand where it is abundant
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
dunite in Science

dunite

[dōō′nīt′, dŭn′īt′]
  1. A coarse-grained igneous rock that consists mainly of olivine.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.