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augite

[aw-jahyt]
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noun
  1. a silicate mineral, chiefly of calcium, magnesium, iron, and aluminum: a dark-green to black variety of monoclinic pyroxene, characteristic of basic rocks.
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Origin of augite

1780–90; < Latin augītis a kind of precious stone < Greek, equivalent to aug(ḗ) sunlight + -ītis, feminine of -ītēs -ite1
Related formsau·git·ic [aw-jit-ik] /ɔˈdʒɪt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for augite

augite

noun
  1. a black or greenish-black mineral of the pyroxene group, found in igneous rocks. Composition: calcium magnesium iron aluminium silicate. General formula: (Ca,Mg,Fe,Al)(Si,Al) 2 O 6 . Crystal structure: monoclinic
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Derived Formsaugitic (ɔːˈɡɪtɪk), adjective

Word Origin

C19: from Latin augītēs, from Greek, from augē brightness
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

augite in Science

augite

jīt′]
  1. A glassy, dark-green to black variety of pyroxene. Chemical formula: (Ca,Na)(Mg,Fe,Al)(Si,Al)2O6.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.