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extrusive

 - 2 dictionary results

ex⋅tru⋅sive

  [ik-stroo-siv, -ziv]
Use extrusive in a Sentence
–adjective
1. tending to extrude.
2. pertaining to extrusion.
3. Also, effusive. Geology. 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.
Origin:
1810–20; extrus(ion) + -ive
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To extrusive
ex·tru·sive   (ĭk-strōō'sĭv, -zĭv)   
adj.  

  1. Tending to push or thrust out.

  2. Tending to protrude or project.

  3. Derived from magma poured out or ejected at the earth's surface. Used of igneous rocks.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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