extrusive

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ɪkˈstruːsɪv/US:USA pronunciation: respellingUSA pronunciation: respelling(ik stro̅o̅′siv, -ziv)


WordReference Random House Unabridged Dictionary of American English © 2026
ex•tru•sive  (ik stro̅o̅′siv, -ziv),USA pronunciation adj. 
  1. Metallurgytending to extrude.
  2. Metallurgypertaining to extrusion.
  3. GeologyAlso, effusive. noting or pertaining to a class of igneous rocks that have been forced out in a molten or plastic condition upon the surface of the earth.
  • extrus(ion) + -ive 1810–20

Collins Concise English Dictionary © HarperCollins Publishers::
extrusive /ɪkˈstruːsɪv/ adj
  1. tending to extrude
  2. (of igneous rocks) formed from magma issuing from volcanoes or cracks in the earth's crust; volcanic
    Compare intrusive
'extrusive' also found in these entries (note: many are not synonyms or translations):
basalt - intrusive - lava - volcanic - effusive - hypabyssal - trachyte
In Lists: Rocks, more...

Forum discussions with the word(s) "extrusive" in the title:


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