EXTRUSIVE - Definition

Pronunciation:		ik'stroosiv
WordNet Dictionary

	Definition:	[adj] (geology) of rock material; forced out while molten through cracks in the earth's surface

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	Synonyms:	eruptive, volcanic

	Antonyms:	intrusive


Webster's 1913 Dictionary

	Definition:	\Ex*tru"sive\, a. [See {Extrude}.] (Geol.) Forced out at the surface; as, extrusive rocks; -- contrasted with {intrusive}.