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[proh-troo-zhuh n, pruh-] /proʊˈtru ʒən, prə-/
the act of protruding or the state of being protruded.
something that protrudes or projects.
Origin of protrusion
1640-50; < Latin prōtrūs(us) (past participle of prōtrūdere to protrude) + -ion
Related forms
nonprotrusion, noun
2. jut, projection, bulge, protuberance. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for protrusion
Contemporary Examples
Historical Examples
  • The surgeon will reduce the protrusion under ether, or operate.

  • His hands roamed over it, feeling every protrusion or irregularity.

    Frank Merriwell's Triumph Burt L. Standish
  • No sign, however, save the protrusion of the tongue, is positive.

    The Horse's Mouth Edward Mayhew
  • The polype is remarkable for the protrusion and contractile power of its lips.

    Glaucus Charles Kingsley
  • This first protrusion of that fact caused a painful confusion in his mind.

    Kipps H. G. Wells
  • Varieties differ in protrusion of pistil beyond the stamen column.

    The Tomato Paul Work
  • Presently she was aware of a protrusion from the window beneath hers.

    Zuleika Dobson Max Beerbohm
  • Exophthalmia in animals born of parents in which an injury to the restiform body had produced that protrusion of the eyeball.

  • The humidity, however, was in some ways only a secondary result of the protrusion of high mountain ranges.

British Dictionary definitions for protrusion


something that protrudes
the state or condition of being protruded
the act or process of protruding
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for protrusion

1640s, from French protrusion, noun of action from past participle stem of Latin protrudere "to push out" (see protrude), or from a similar formation in English.

Online Etymology Dictionary, © 2010 Douglas Harper
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protrusion in Medicine

protrusion pro·tru·sion (prō-trōō'zhən)

  1. The act of protruding.

  2. The state of being protruded.

  3. A position of the mandible forward from centric relation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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