granulite

[gran-yuh-lahyt]
noun
a metamorphic rock composed of granular minerals of uniform size, as quartz, feldspar, or pyroxene, and showing a definite banding.

Origin:
1840–50; granule + -ite1

granulitic [gran-yuh-lit-ik] , adjective
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Collins
World English Dictionary
granulite (ˈɡrænjʊˌlaɪt)
 
n
a granular foliated metamorphic rock in which the minerals form a mosaic of equal-sized granules
 
granulitic
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
granulite   (grān'yə-līt')  Pronunciation Key 
A fine-grained metamorphic rock consisting of similarly sized, interlocking minerals. Unlike most metamorphic rocks, granulites do not exhibit foliation or textural or mineralogical layering.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
In addition, some metamorphosed plutonic rocks have been altered retrogressively to amphibolite and granulite facies.
Gneiss and granulite are the coarsest grained metamorphic rocks.
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