EXTRUSIVE

extrusive

(adjective) of rock material; forced out while molten through cracks in the earth’s surface

Source: WordNet® 3.1

Adjective

extrusive (comparative more extrusive, superlative most extrusive)

Jutting out; extruding.

(geology) Of rocks: forced, while in a plastic or molten state, on to the Earth's surface to lie atop existing rocks.

Synonyms

• effusive

Noun

extrusive (plural extrusives)

(geology) Rock which has been formed through volcanic extrusion.

Source: Wiktionary

Ex*tru"sive, a. [See Extrude.] (Geol.)

Definition: Forced out at the surface; as, extrusive rocks; -- contrasted with intrusive.

Source: Webster’s Unabridged Dictionary 1913 Edition

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