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Meaning of extrusive

ex•tru•sive

Pronunciation: (ik-str'siv, -ziv), [key]
— adj.
  1. tending to extrude.
  2. pertaining to extrusion.
  3. noting or pertaining to a class of igneous rocks that have been forced out in a molten or plastic condition upon the surface of the earth.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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