[proh-troo-zhuhn, pruh-]
the act of protruding or the state of being protruded.
something that protrudes or projects.

1640–50; < Latin prōtrūs(us) (past participle of prōtrūdere to protrude) + -ion

nonprotrusion, noun

2. jut, projection, bulge, protuberance. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
protrusion (prəˈtruːʒən)
1.  something that protrudes
2.  the state or condition of being protruded
3.  the act or process of protruding

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

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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Example sentences
Yet this bony protrusion at the end of the lower jaw is not seen in any other hominid species.
Then he opened the hatch and climbed out onto the weather bridge, a large protrusion off the sub's notched steel sail.
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