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 Officials also are interested in any signs of two viruses that have appeared in turkeys in recent years, with symptoms including warty protuberances in the head and eye area. USA TODAY, "Tombstone gunfight, sparkler spoiler, no superbloom: News from around our 50 states," 18 Feb. 2020 The tropical hibiscus produces some of the most lurid blossoms in the garden — a broad, ruffled, flared collar around a central antenna full of knobbly, nectar-rich protuberances. Adrian Higgins, Washington Post, "The sultry plant that will break your heart," 13 Aug. 2019 Find the places where elk, deer, and moose spend the winter, then comb the terrain for the pointy protuberances that naturally drop off the animals. Mike Koshmrl, National Geographic, "What it takes to catch antler thieves," 19 July 2019 The bone spurs jut off of what’s called the external occipital protuberance (EOP) of the skull. Beth Mole, Ars Technica, "Debunked: The absurd story about smartphones causing kids to sprout horns," 21 June 2019 The effect, called enlarged external occipital protuberance, used to be so uncommon, Sayers said, that one of its early observers, toward the end of the 19th century, objected to its title., "Horns are growing on young people’s skulls; researchers blame phone use," 22 June 2019 This anatomical feature is called an external occipital protuberance, or EOP. Allen Kim, CNN, "A report says young people are growing horns on their skulls. Critics don't buy it," 21 June 2019 The 2018 paper discussed an alarming prevalence of an enlarged external occipital protuberance (EOP), a bony projection off the back of the skull just above the neck, in young people. Emily Toomey, Smithsonian, "Cell Phones Are Probably Not Making Us Grow Horns," 20 June 2019 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

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

Time Traveler

The first known use of protuberance was in 1646

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Statistics for protuberance

Last Updated

24 Feb 2020

Cite this Entry

“Protuberance.” Dictionary, Merriam-Webster, Accessed 27 Feb. 2020.

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More Definitions for protuberance


How to pronounce protuberance (audio)

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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