protrusion
Americannoun
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protrusions
plural
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the act of protruding or the state of being protruded.
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something that protrudes or projects.
- Synonyms:
- protuberance, bulge, projection, jut
noun
-
something that protrudes
-
the state or condition of being protruded
-
the act or process of protruding
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of protrusion
1640–50; < Latin prōtrūs ( us ) (past participle of prōtrūdere to protrude ) + -ion
Explanation
Anything that sticks or juts out from a surface is a protrusion. When you're rock climbing, every protrusion is a possible handle to grab or step to stand on. In medicine, most protrusions are evidence of some disorder or illness, like a bulging protrusion in your belly. Most other protrusions, though, are perfectly normal: your nose is a protrusion in the middle of your face, and a spire can be described as a protrusion on the top of a church. The Latin source of protrusion is protrudere, "to push out."
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
It was chosen because this animal’s femur lacks a crest or raised bony protrusion – known as a trochanter – where part of the tail musculature would attach.
From Science Daily ● Aug. 10, 2026
When it’s almost time for the plant to open, the spadix — a conic protrusion from inside the plant — emerges and accelerates in growth, climbing up to six inches per day.
From Los Angeles Times ● Jul. 10, 2026
His surgery on Thursday will repair an inguinal hernia, a protrusion in the groin area due to a tear in the abdominal muscles.
From Barron's ● Dec. 24, 2025
I watched an older woman grow overcome by the proclamation that a protrusion in her abdomen was being burned out of her body.
From Slate ● Sep. 25, 2024
The toboggan hit a much larger protrusion that sent it, along with Duane, high into the air and on a slant, as well.
From "The Very, Very Far North" by Dan Bar-el
Filopodia are tiny protrusions that extend from dendrites.
From Science Daily ● May 6, 2026
Grey matter consists of neuronal cell bodies and their dendrites - short protrusions that communicate with neurons nearby.
From BBC ● Jan. 26, 2026
If an oarfish happens to swim up to the ocean’s surface, a sailor would see a long slithering creature with spiky protrusions on its head and could believe it was a sea monster, Paig-Tran said.
From Los Angeles Times ● Nov. 21, 2024
The team utilized an oblique angle deposition method to synthesize nickel featuring finely crafted, vertically aligned nanorods protrusions.
From Science Daily ● Mar. 22, 2024
That was when he saw it: protrusions deep within the temporal bone, where the ear canal would have been.
From "The Reader" by Traci Chee
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
