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Plutonic definition

Plu·tonic (plo̵̅o̅ tän′ik)

adjective

  1. Plutonian
  2. Geol. formed at great depth by intense heat and pressure: said of rock, esp. intrusive igneous rock, that is typically coarsegrained and granitelike

Etymology: < L Pluto (gen. Plutonis) + -ic

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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