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pluton

American  
[ploo-ton] / ˈplu tɒn /

noun

Geology.

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

pluton British  
/ ˈpluːtɒn /

noun

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

"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
pluton Scientific  
/ plo̅o̅′tŏn′ /

  1. 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.

Etymology

Origin of pluton

1935–40; < German Pluton, back formation from plutonisch plutonic

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.