[ an-awr-thuh-sahyt ]
/ ænˈɔr θəˌsaɪt /
a granular plutonic rock composed largely of labradorite or a more calcic feldspar.
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Origin of anorthosite
OTHER WORDS FROM anorthositean·or·tho·sit·ic [an-aw-thuh-sit-ik], /ænˌɔ θəˈsɪt ɪk/, adjective
Words nearby anorthosite
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Example sentences from the Web for anorthosite
In Canada great portions of the eastern portion of the Dominion are formed of gabbros, norite, anorthosite and allied rock types.
British Dictionary definitions for anorthosite
/ (ænˈɔːθəˌsaɪt) /
a coarse-grained plutonic igneous rock consisting almost entirely of plagioclase feldspar
Word Origin for anorthosite
C19: from French anorthose (see an-, ortho-) + -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
Scientific definitions for anorthosite
[ ăn-ôr′thə-sīt′ ]
An igneous rock consisting almost entirely of plagioclase feldspar, especially the labradorite variety. Anorthosites have been identified among rock samples collected from the Moon.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.