Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun geology one of the major groups of rock that makes up the
crust of theEarth ; formed by thecooling ofmolten rock, either below thesurface (intrusive ) or on the surface (extrusive )
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun rock formed by the solidification of molten magma
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