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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Plus, one of the most voracious algae-eaters, the long-spined black sea urchin, began dying in the Caribbean in the 1980s, likely from a waterborne pathogen. Benji Jones, Vox, 8 Oct. 2024 Some of the best-tasting sea urchin in the world is found in the Channel Islands, off the coast of Santa Barbara. Jaime Lowe, New York Times, 26 Sep. 2024 The divers harvest abalone, sea urchins and more by venturing into dark waters without the aid of oxygen tanks or professional diving equipment, instead using instruments like nets and hoes. Kimmy Yam, NBC News, 10 Oct. 2024 Scientists have also found toxic concentrations of TNT in Atlantic purple sea urchins, mysid crustaceans and blue mussels. Paul Hockenos, Smithsonian Magazine, 10 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 16 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

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