protrusion

noun

pro·​tru·​sion prō-ˈtrü-zhən How to pronounce protrusion (audio)
1
: something (such as an anatomical part or excrescence) that protrudes
2
: the act of protruding : the state of being protruded
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

Example Sentences

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.
Recent Examples on the Web Again, each lens has its protrusion rather than being part of a continuous metal frame. Chris Smith, BGR, 17 Oct. 2022 In the early 1990s, amateur fossil hunters noticed an odd protrusion in the Utah rock. Corinne Purtill, Los Angeles Times, 19 Aug. 2022 There’s a protrusion encasing the Digital Crown and Side button. Chris Smith, BGR, 7 Sep. 2022 This tongue-like protrusion of nerves both processes smells in the brain and is closely entangled with older brain regions, specifically the amygdala, which handles emotions, and the hippocampus, which deals with memory. Wired, 2 Aug. 2022 For those who received a nipple graft following their breast reconstruction surgeries, which leaves a small bump to mimic the protrusion of the original nipple, 4D repigmentation is an option. Devon Abelman, Allure, 25 Apr. 2022 In a 13th-century portrait attributed to the Chinese monk Hu Zhifu, for example, a man displays the marks of enlightenment: the small circle on his forehead, hair in tight curls, the protrusion at the apex of the skull. Lee Lawrence, WSJ, 11 May 2022 Not so with the latest Navigator, which has LINCOLN plastered across its stern and the brand's crosshair emblem set as a nearly foot-tall protrusion within its gently redrawn grille. Mike Sutton, Car and Driver, 4 Mar. 2022 In girls transitioning to boys, testosterone generally leads to permanent voice-lowering, facial hair and protrusion of the Adam’s apple, said Dr. Stephanie Roberts, a specialist at Boston Children’s Hospital’s Gender Management Service. NBC News, 22 Apr. 2022 See More

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.

Word History

Etymology

Latin protrudere

First Known Use

1646, in the meaning defined at sense 2

Time Traveler
The first known use of protrusion was in 1646

Dictionary Entries Near protrusion

Cite this Entry

“Protrusion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/protrusion. Accessed 26 Nov. 2022.

Kids Definition

protrusion

noun

pro·​tru·​sion prō-ˈtrü-zhən How to pronounce protrusion (audio)
1
: the act of protruding : the state of being protruded
2
: something that protrudes

Medical Definition

protrusion

noun

pro·​tru·​sion prō-ˈtrü-zhən How to pronounce protrusion (audio)
1
: the quality or state of protruding
the protrusion of a jaw
2
: something (as an anatomical part) that protrudes

More from Merriam-Webster on protrusion

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