[proh-troo-zhuhn, pruh-]


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 formsnon·pro·tru·sion, noun

Synonyms for protrusion Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for protrusion

swelling, protuberance, projection

Examples from the Web for protrusion

Contemporary Examples of protrusion

Historical Examples of protrusion

  • The surgeon will reduce the protrusion under ether, or operate.

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

  • 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.


    Charles Kingsley

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


    H. G. Wells

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

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

protrusion in Medicine




The act of protruding.
The state of being protruded.
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.