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felsite

[fel-sahyt] /ˈfɛl saɪt/
noun
1.
a dense, fine-grained, igneous rock consisting typically of feldspar and quartz, both of which may appear as phenocrysts.
Origin
1785-1795
1785-95; fels(par) + -ite1
Related forms
felsitic
[fel-sit-ik] /fɛlˈsɪt ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for felsitic

felsite

/ˈfɛlsaɪt/
noun
1.
any fine-grained igneous rock consisting essentially of quartz and feldspar
Derived Forms
felsitic (fɛlˈsɪtɪk) adjective
Word Origin
C18: fels(par) + -ite1
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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felsitic in Science
felsite
  (fěl'sīt')   
A fine-grained, light-colored igneous rock, consisting mainly of feldspar and quartz.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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