Etymology
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extrusive (adj.)

"of or pertaining to extrusion or that which has been extruded," especially in geology, of rock that has been thrust out of the earth by volcanic activity, 1816, from Latin extrus-, past-participle stem of extrudere "thrust out; drive away" (see extrusion) + -ive. Related: Extrusively.

updated on April 28, 2020

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