'Extrusive' definitions:
Definition of 'extrusive'
adjective
Of rock material; forced out while molten through cracks in the earth's surface [ant:
intrusive]
Definition of 'Extrusive'
- Extrusive \Ex*tru"sive\, a. [See Extrude.] (Geol.)
Forced out at the surface; as, extrusive rocks; -- contrasted
with intrusive.
[Webster 1913 Suppl.]
Words containing 'Extrusive'
