protrusion

noun
pro·​tru·​sion | \ prō-ˈtrü-zhən How to pronounce protrusion (audio) \

Definition of protrusion

1 : something (such as an anatomical part or excrescence) that protrudes
2 : the act of protruding : the state of being protruded

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Choose the Right Synonym for protrusion

projection, protrusion, protuberance, bulge mean an extension beyond the normal line or surface. projection implies a jutting out especially at a sharp angle. those projections along the wall are safety hazards protrusion suggests a thrusting out so that the extension seems a deformity. the bizarre protrusions of a coral reef protuberance implies a growing or swelling out in rounded form. a skin disease marked by warty protuberances bulge suggests an expansion caused by internal pressure. bulges in the tile floor

Examples of protrusion in a Sentence

bony protrusions on the outside of the elbow a roof with many protrusions The pain was caused by a protrusion of a disc in his lower back.
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Recent Examples on the Web

Hacienda staff noticed the protrusion on the women's abdomen months before, the policereport said. Bree Burkitt, azcentral, "Police report: Behavior of Hacienda nurse accused of raping patient changed in months before birth," 13 June 2019 How about those pouch-like protrusions bulging from underneath larger clouds? Catherine Zuckerman, National Geographic, "Clouds, explained," 24 Apr. 2019 His coach, Alberto Salazar, revealed two weeks later that Rupp had surgery after the race to fix a condition called Haglund’s deformity, a bone protrusion in his left heel that had worn on his Achilles tendon and partially tore it. Shannon Ryan, chicagotribune.com, "Galen Rupp, who won the Chicago Marathon in 2017, is recovering from an Achilles injury," 7 June 2019 Much recent effort also focuses on finding biomarkers for TNTs to distinguish them from similar-looking structures like filopodia, long cellular protrusions that are used for sensing and locomotion. Quanta Magazine, "Cells Talk and Help One Another via Tiny Tube Networks," 23 Apr. 2018 There remains a driver airbag in the steering wheel, but the wheel (as well as the pedals) retract into the dashboard when the ESF 2019 is in self-driving mode, to reduce potential injuries from impacts with those protrusions. Alexander Stoklosa, Car and Driver, "The Mercedes-Benz ESF Is a One-Car Showcase of the Way Safety Will Look in Vehicles of the Future," 20 May 2019 The shape has six sides at the top and five sides at the bottom, and one of the sides had a triangular protrusion. Avery Thompson, Popular Mechanics, "Scientists Discover a New Shape That Might Be Inside You Right Now," 30 July 2018 Cilia, microscopic hairlike protrusions lining your nose, can channel this dirty mucus to the front of the organ (or down your throat). Carolyn L. Todd, SELF, "Quick Question: Why Do We Sneeze?," 8 Mar. 2019 The Satisfye Pro Gaming Grip slides over the Switch and adds protrusions that fit in your palm and make the whole thing sit in your hands more securely. Alexander George, Popular Mechanics, "This Is the Grip I Use For My Nintendo Switch," 31 Dec. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'protrusion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of protrusion

1646, in the meaning defined at sense 2

History and Etymology for protrusion

Latin protrudere

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Statistics for protrusion

Last Updated

12 Jul 2019

Look-up Popularity

Time Traveler for protrusion

The first known use of protrusion was in 1646

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More Definitions for protrusion

protrusion

noun

English Language Learners Definition of protrusion

: a part that sticks out
: the act of sticking out or the condition of something that sticks out

protrusion

noun
pro·​tru·​sion | \ prō-ˈtrü-zhən How to pronounce protrusion (audio) \

Medical Definition of protrusion

1 : the quality or state of protruding the protrusion of a jaw
2 : something (as an anatomical part) that protrudes

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Comments on protrusion

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