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plutonic: Meaning and Definition of

plu•ton•ic

Pronunciation: (pl-ton'ik), [key]
— adj. Geol.
  1. noting or pertaining to a class of igneous rocks that have solidified far below the earth's surface.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
Plutonian plutonism
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