[ ploo-ton ]
/ ˈplu tɒn /

noun Geology.

any body of igneous rock that solidified far below the earth's surface.



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Origin of pluton

1935–40; < German Pluton, back formation from plutonisch plutonic Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for pluton

British Dictionary definitions for pluton

/ (ˈpluːtɒn) /


any mass of igneous rock that has solidified below the surface of the earth

Word Origin for pluton

C20: back formation from plutonic
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 pluton

[ plōōtŏn′ ]

A large body of igneous rock formed when a plume of magma cools and solidifies underground. Although most plutons are deep within the Earth's crust, some become exposed at the surface due to plate-tectonic processes.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.