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sea urchin
noun
: any of numerous echinoderms (class Echinoidea) that are usually enclosed in thin brittle globular tests covered with movable spines
Examples of sea urchin in a Sentence
Recent Examples on the Web
Other algae grazers like sea urchins, meanwhile, have vanished, too.
—Benji Jones, Vox, 8 Oct. 2024
Earlier this year, researchers found that gray whales were avoiding the Oregon coast due to a drastic increase in sea urchins that have been depleting local kelp forests.
—Meira Gebel, Axios, 4 Oct. 2024
Our ramen noodles with California sea urchin are one of my current favorites.
—Chelsea Davis, Forbes, 17 Sep. 2024
Best in show here: pillowy gnocchi served with sea urchin plucked from the rocks just yards away from where we were seated.
—Andrew Sessa, Travel + Leisure, 12 Sep. 2024
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Word History
First Known Use
1591, in the meaning defined above
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Cite this Entry
“Sea urchin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sea%20urchin. Accessed 24 Nov. 2024.
Kids Definition
sea urchin
noun
: any of a class of small marine invertebrate animals that are echinoderms, usually live on or burrow in the sea bottom, and are enclosed in roundish shells covered with spines that can move
More from Merriam-Webster on sea urchin
Nglish: Translation of sea urchin for Spanish Speakers
Britannica.com: Encyclopedia article about sea urchin
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