Definition of extrusive in English:

extrusive

Line breaks: ex|tru¦sive
Pronunciation: /ɪkˈstruːsɪv
 
/

adjective

Geology
  • Relating to or denoting rock that has been extruded at the earth’s surface as lava or other volcanic deposits.
    More example sentences
    • In practice pyroclastic and volcaniclastic rocks include all the products of extrusive volcanic activity except lava flows.
    • The northern margin of the melange is marked by a thrust contact with both the Carboniferous sedimentary rocks and extrusive volcanic sequence.
    • Although there are no outcrops of Devonian extrusive volcanic rocks in NW Scotland, they can be found in southern and central Scotland and the Orkney Islands.

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Pronunciation: skəʊʃ
noun
a small amount; a little