extrusive

/IH0 K S T R UW1 S IH0 V/
noun
  1. 1

    Rock which has been formed through volcanic extrusion.

adjective
  1. 1

    Jutting out; extruding.

  2. 2

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

Synonyms

Source: https://en.wiktionary.org/wiki/extrusive