extrusive

2 definitions found

extrusive - Collaborative International Dictionary of English v.0.48 :

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

extrusive - WordNet (r) 2.1 (2005) :

  extrusive
      adj 1: of rock material; forced out while molten through cracks
             in the earth's surface [ant: intrusive]