plu·​ton ˈplü-ˌtän How to pronounce pluton (audio)
: a typically large body of intrusive igneous rock

Examples of pluton in a Sentence

Recent Examples on the Web Called a pluton by geologists, the Barre granite formation is calculated to be four miles long, two miles wide and 10 miles deep. Walter Nicklin, Washington Post, 16 June 2022 In Nevada, for instance, geologists find fibers associated with jagged landscape formed by plutons, which are huge rock formations caused by liquid magma forced upward into the cooler crust and then solidifying. Deborah Blum, WIRED, 17 Jan. 2014

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'pluton.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


probably back-formation from plutonic

First Known Use

1934, in the meaning defined above

Time Traveler
The first known use of pluton was in 1934

Dictionary Entries Near pluton

Cite this Entry

“Pluton.” Dictionary, Merriam-Webster, Accessed 12 Apr. 2024.

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