extrusion

UK: /ɪkˈstruːʒən/ US: /ɪkˈstruʒən/ ,(ik stro̅o̅′zhən)

WordReference Random House Unabridged Dictionary of American English © 2025

ex•tru•sion  (ik stro̅o̅′zhən), n. 

1. the act of extruding or the state of being extruded.
2. Metallurgy something that is extruded.

• Medieval Latin extrūsiōn- (stem of extrūsiō), equivalent. to Latin extrūs(us) (past participle of extrūdere to extrude) + -iōn- -ion
• 1530–40

Collins Concise English Dictionary © HarperCollins Publishers::

extrusion / ɪkˈstruːʒən/ noun

1. the act or process of extruding
2. the movement of magma onto the surface of the earth through volcano craters and cracks in the earth's crust, forming igneous rock
3. any igneous rock formed in this way
4. a component or length of material formed by the process of extruding

Etymology: 16th Century: from Medieval Latin extrūsiō, from extrūdere to extrude

WordReference Random House Learner's Dictionary of American English © 2025

ex•trude /ɪkˈstrud/   v. [~ + object] , -trud•ed, -trud•ing. 

1. Geology to force or press out, as through a small opening that gives shape:
   The spaghetti-making machine extrudes dough through tiny holes.

ex•tru•sion /ɪkˈstruʒən/  n. [uncountable] See -trude-.

WordReference Random House Unabridged Dictionary of American English © 2025

ex•trude  (ik stro̅o̅d′), v., -trud•ed, -trud•ing. 
v.t. 

1. Geology to thrust out; force or press out;
   expel:
   to extrude molten rock.
2. Metallurgy to form (metal, plastic, etc.) with a desired cross section by forcing it through a die.

v.i. 

3. to protrude.
4. Metallurgy to be extruded:
   This metal extrudes easily.

• Latin extrūdere to thrust out, drive out, equivalent. to ex- ex-¹ + trūdere to thrust, push
• 1560–70

ex•trud′er, n. 
ex•tru•si•ble  (ik stro̅o̅′sə bəl, -zə-), ex•trud′a•ble, adj.