noun Geology.
a large body of intrusive igneous rock believed to have crystallized at a considerable depth below the earth's surface; pluton.

1900–05; batho- + -lith

batholithic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
batholith or batholite (ˈbæθəlɪθ, ˈbæθəˌlaɪt)
a very large irregular-shaped mass of igneous rock, esp granite, formed from an intrusion of magma at great depth, esp one exposed after erosion of less resistant overlying rocks
batholite or batholite
batho'lithic or batholite
batho'litic or batholite

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1903, from Ger. (1892), coined by Ger. geologist Eduard Suess (18311914) from Gk. bathos "depth" + -lith, from lithos "stone."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
batholith   (bāth'ə-lĭth')  Pronunciation Key 

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A large mass of igneous rock that has intruded and melted surrounding strata at great depths. Batholiths usually have a surface area of over 100 km2 (38 mi2).
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Also, pre-batholith metamorphic rocks are moderately extensive.
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