extrusive

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ex·tru·sive

 (ĭk-stro͞o′sĭv, -zĭv)
adj.
Derived from magma poured out or ejected at the earth's surface. Used of igneous rocks.

extrusive

(ɪkˈstruːsɪv)
adj
1. tending to extrude
2. (Geological Science) (of igneous rocks) formed from magma issuing from volcanoes or cracks in the earth's crust; volcanic. Compare intrusive2

ex•tru•sive

(ɪkˈstru sɪv, -zɪv)

adj.
1. pertaining to extrusion.
2. of 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.
[1810–20]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.extrusive - of rock material; forced out while molten through cracks in the earth's surface
geology - a science that deals with the history of the earth as recorded in rocks
intrusive - of rock material; forced while molten into cracks between layers of other rock
Translations
extrusif