[ fel-sahyt ]
/ ˈfɛl saɪt /
a dense, fine-grained, igneous rock consisting typically of feldspar and quartz, both of which may appear as phenocrysts.
Related formsfel·sit·ic [fel-sit-ik] /fɛlˈsɪt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for felsite
/ (ˈfɛlsaɪt) /
any fine-grained igneous rock consisting essentially of quartz and feldspar
Derived Formsfelsitic (fɛlˈsɪtɪk), adjective
Word Origin for felsite
C18: fels(par) + -ite 1
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
Science definitions for felsite
[ fĕl′sīt′ ]
A fine-grained, light-colored igneous rock, consisting mainly of feldspar and quartz.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.