protrusion

noun

pro·​tru·​sion prō-ˈtrü-zhən 

1

: something (such as an anatomical part or excrescence) that protrudes

2

: the act of protruding : the state of being protruded

Synonyms

• bulge
• bunch
• convexity
• jut
• overhang
• projection
• protuberance
• swell

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.

Recent Examples on the Web

For instance, the study authors noticed a ventral protrusion at the rear of the organism. —Rupendra Brahambhatt, Ars Technica, 12 July 2024

The gnomon, or the shadow-casting protrusion, is 35 feet tall with a shadow twice that length. —Stefanie Waldek, Travel + Leisure, 17 June 2024

The scope’s camera can clearly see polyps, or an out-of-place protrusion of cells, which can then be snipped off. —Charlotte Hu, Vox, 4 June 2024

During his presentation, Coleman will explain the anatomy behind hernia protrusions, their potential risk factors and the latest advancements in surgery for hernia repair, the release said. To register, visit: nwhinfo.com/hernia_talk. —Post-Tribune, Chicago Tribune, 8 June 2024

Word History

Etymology

Latin protrudere

First Known Use

1646, in the meaning defined at sense 2

Kids Definition

protrusion

noun

pro·​tru·​sion prō-ˈtrü-zhən 

1

: the act of protruding : the state of being protruded

2

: something that protrudes

Medical Definition

protrusion

noun

pro·​tru·​sion prō-ˈtrü-zhən 

1

: the quality or state of protruding

the protrusion of a jaw

2

: something (as an anatomical part) that protrudes