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plutonism
2 dictionary results for: Plutonism
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
plu·to·nism       [ploot-n-iz-uhm] Pronunciation Key
–noun Geology.
1.the intrusion of magma and associated deep-seated processes within the earth's crust.
2.(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).
[Origin: 1840–50; pluton(ic) + -ism]

—Related forms
plu·to·nist, noun
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
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Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Plutonism

Plu"to*nism\, n. [Cf. F. plutonisme.] The theory, early advanced in geology, that the successive rocks of the earth"s crust were formed by igneous fusion; -- opposed to the Neptunian theory.

Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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