pro·​tu·​ber·​ance | \ prō-ˈtü-b(ə-)rən(t)s How to pronounce protuberance (audio) , -ˈtyü-\

Definition of protuberance

1 : something that is protuberant
2 : the quality or state of being protuberant

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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

Most of the first 10 lines show microscopic parallel marks on the sides of the groove, probably caused by slight protuberances on the sides of the tool. Kiona N. Smith, Ars Technica, "Neanderthals etched a message on this 36,000-year-old stone tool," 3 May 2018 Throughout, every protuberance is thin and delicately rough-edged, like deckled paper. Roberta Smith, Will Heinrich, Martha Schwendener And Jason Farago, New York Times, "What to See in New York Art Galleries This Week," 20 Dec. 2017 The other bore tooth-like protuberances, called ossicles, above speckled reddish black skin. Lorraine Boissoneault, Smithsonian, "Is the Mysterious Sea Cucumber Slipping Out of Our Grasp?," 4 Nov. 2017 In literally the blink of an eye, all those little bumps, spikes, and protuberances disappear. Ed Yong, The Atlantic, "Octopus-Inspired Material Can Change Its Texture," 12 Oct. 2017 From this face extended a fleshy protuberance, similar to a mini elephant trunk or a tapir’s proboscis. Steph Yin, New York Times, "Strange Mammals That Stumped Darwin Finally Find a Home," 3 July 2017 The jewel-tone dresses had fan-like protuberances attached to them. The Washington Post, The Denver Post, "Saint Laurent is trying too hard to be sexy, and it’s just not working," 1 Mar. 2017 These knobby protuberances, known as galls, are sort of like tree cysts induced by the presence of the host wasp's young. Andrew Forbes, National Geographic, "New Crypt-Keeper Wasp Is Parasite That Bursts From Host's Head," 25 Jan. 2017 A tinge of menace emanates from the best ones, their spiky protuberances, wiggly tendrils and starburst-style blossoms evoking sci-fi weaponry and ear-splitting explosions. David Pagel,, "Take a walk through the imaginary garden of Anna Zemánková," 9 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'protuberance.' 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 protuberance

1646, in the meaning defined at sense 1

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Time Traveler for protuberance

The first known use of protuberance was in 1646

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English Language Learners Definition of protuberance

: a usually rounded part that sticks out from a surface


pro·​tu·​ber·​ance | \ prō-ˈt(y)ü-b(ə-)rən(t)s How to pronounce protuberance (audio) \

Medical Definition of protuberance

1 : something that is protuberant a bony protuberance
2 : the quality or state of being protuberant

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More from Merriam-Webster on protuberance

Thesaurus: All synonyms and antonyms for protuberance

Spanish Central: Translation of protuberance

Nglish: Translation of protuberance for Spanish Speakers

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