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
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The crew also found cactus-like sea urchins and marine sponges that were as tall as humans. Scott Travers, Forbes, 14 Dec. 2024 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 See all Example Sentences for sea urchin 

Word History

First Known Use

1591, in the meaning defined above

Time Traveler
The first known use of sea urchin was in 1591

Dictionary Entries Near sea urchin

Cite this Entry

“Sea urchin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sea%20urchin. Accessed 30 Dec. 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

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