Definitions for: Extrusive


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



Webster (1913) Definition: Ex*tru"sive, a. [See Extrude.] (Geol.)
Forced out at the surface; as, extrusive rocks; -- contrasted
with intrusive.

Synonyms: eruptive, volcanic

Antonyms: intrusive

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