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plutonism
[ ploot-n-iz-uhm ]
noun
, Geology.
- the intrusion of magma and associated deep-seated processes within the earth's crust.
- (often initial capital letter) the disproven theory that all rocks formed by solidification of a molten mass, promulgated by Scottish geologist James Hutton (1726–97).
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Other Words From
- pluto·nist noun
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Word History and Origins
Origin of plutonism1
First recorded in 1840–50; pluton(ic) + -ism
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