verb (used with object), extruded, extruding.
to thrust out; force or press out; expel: to extrude molten rock.
to form (metal, plastic, etc.) with a desired cross section by forcing it through a die.
verb (used without object), extruded, extruding.
to protrude.
to be extruded: This metal extrudes easily.

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

extruder, noun
extrusible [ik-stroo-suh-buhl, -zuh-] , extrudable, adjective
unextruded, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
extrude (ɪkˈstruːd)
1.  (tr) to squeeze or force out
2.  (tr) to produce (moulded sections of plastic, metal, etc) by ejection under pressure through a suitably shaped nozzle or die
3.  (tr) to chop up or pulverize (an item of food) and re-form it to look like a whole: a factory-made rod of extruded egg
4.  a less common word for protrude
[C16: from Latin extrūdere to thrust out, from trūdere to push, thrust]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1560s, from L. extrudere, from ex- out + trudere to thrust (see extrusion). Related: Extruded; extruding.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

extrude ex·trude (ĭk-strōōd')
v. ex·trud·ed, ex·trud·ing, ex·trudes

  1. To thrust, force, or press out.

  2. To protrude or project.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
As they develop inside your red blood cells, they extrude minute knobs onto the surface of the cells.
Meanwhile he is rid of the tube and struggles to extrude vowels and consonants from his larynx.
So it is good to paw over my tiresome routines and snap judgments, to extrude doubts and worries and clean out that hog barn.
Seismicity and deformation remain unchanged as lava continues to extrude onto the south crater floor.
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