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
See all Synonyms & Antonyms 
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 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 To get plant cuttings, look for the node—a small protrusion that will turn into roots—between each leaf or set of leaves. Deanna Kizis, Sunset Magazine, 19 Apr. 2022 There also appears to be a small protrusion on the front of the roof that could be a Lidar sensor like on the new Lotus Eletre. Caleb Miller, Car and Driver, 11 Apr. 2022 And the protrusion is there to stay for one more year. Chris Smith, BGR, 23 Mar. 2022 See More
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 To get plant cuttings, look for the node—a small protrusion that will turn into roots—between each leaf or set of leaves. Deanna Kizis, Sunset Magazine, 19 Apr. 2022 There also appears to be a small protrusion on the front of the roof that could be a Lidar sensor like on the new Lotus Eletre. Caleb Miller, Car and Driver, 11 Apr. 2022 And the protrusion is there to stay for one more year. Chris Smith, BGR, 23 Mar. 2022 See More Word History
Etymology
Latin protrudere
First Known Use
1646, in the meaning defined at sense 2
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
protrusion
noun
as in protuberance
a part that sticks out from the general mass of something the bizarrely shaped protrusions of a coral reef Synonyms & Similar Words
Relevance
- protuberance
- projection
- bulge
- overhang
- dome
- convexity
- section
- swell
- portion
- jut
- expansion
- piece
- swelling
- knob
- block
- dilatation
- bump
- knot
- mound
- lump
- puff
- nub
- bunch
- hump
- hill
- snag
- enlargement
- blob
- increase
- knurl
- escalation
- obtrusion
- gibbosity
Antonyms & Near Antonyms
- cavity
- depression
- recess
- pit
- hole
- indentation
- hollow
- concave
- concavity
- crater
- dent
- valley
- basin
- well
- bowl
- groove
- indent
- dip
- pocket
- trench
- dint
- impression
- indenture
- furrow
- trough
- notch
- dimple
- gouge
Synonym Chooser
Some common synonyms of protrusion are bulge, projection, and protuberance. While all these words mean "an extension beyond the normal line or surface," protrusion suggests a thrusting out so that the extension seems a deformity.
the bizarre protrusions of a coral reef
The meanings of bulge and protrusion largely overlap; however, bulge suggests an expansion caused by internal pressure.
bulges in the tile floor
The synonyms projection and protrusion are sometimes interchangeable, but projection implies a jutting out especially at a sharp angle.
those projections along the wall are safety hazards
The words protuberance and protrusion can be used in similar contexts, but protuberance implies a growing or swelling out in rounded form.
a skin disease marked by warty protuberances