protuberance

noun

pro·​tu·​ber·​ance prō-ˈtü-b(ə-)rən(t)s How to pronounce protuberance (audio)
-ˈtyü-
1
: something that is protuberant
2
: the quality or state of being protuberant
Choose the Right Synonym for protuberance

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 protuberance in a Sentence

the tree trunk had several mossy protuberances where branches had once grown
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In the far distance lies the Pacific Ocean, and beyond that, featureless protuberances labeled Japan, Russia and China. Matthew Carey, Deadline, 1 Sep. 2025 Above the central display is a ventilative protuberance sporting a pair of menacing ambient lights. Brett Berk, Robb Report, 19 Aug. 2025 Violet-blue protuberances are surrounded by what look like thorns but are actually soft, if jagged, flower parts. Joshua Siskin, Orange County Register, 14 Mar. 2025 By flying drones over a remote stretch of the Canadian Arctic, scientists were able to capture unique footage of narwhals, shedding light on the function of their famed protuberances, according to a study published Feb. 27 in Frontiers in Marine Science. Brendan Rascius, Miami Herald, 4 Mar. 2025 See All Example Sentences for protuberance

Word History

First Known Use

1646, in the meaning defined at sense 1

Time Traveler
The first known use of protuberance was in 1646

Browse Nearby Words

Cite this Entry

“Protuberance.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/protuberance. Accessed 8 Sep. 2025.

Kids Definition

protuberance

noun
pro·​tu·​ber·​ance prō-ˈt(y)ü-b(ə-)rən(t)s How to pronounce protuberance (audio)
1
: the quality or state of bulging beyond a surrounding surface
2

Medical Definition

protuberance

noun
pro·​tu·​ber·​ance prō-ˈt(y)ü-b(ə-)rən(t)s How to pronounce protuberance (audio)
1
: something that is protuberant
a bony protuberance
2
: the quality or state of being protuberant

More from Merriam-Webster on protuberance

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