a. [f. L. extrūs- ppl. stem of extrūdĕre to EXTRUDE + -IVE.] a. Tending to extrude or thrust outwards. b. Resulting from or characterized by extrusion. c. Capable of being protruded.
1816. Keatinge, Trav. (1817), II. 24. These hills are not, however, the extrusive edges of strata, but rather elevated table land.
1848. Johnston, in Proc. Berw. Nat. Club, II. 307. The shafts are extrusive, being pushed out like a telescope.
1886. Proctor, in 19th Cent., May, 693. The immense extrusive power of the volcanoes of the tertiary era.
