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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My personality is Paleozoic: sea urchin, horn lantern with the panes of horn left out. Max Ufberg, hazlitt.net, 10 Jan. 2025 Ago Bay is the heartland of Japan's legendary ama divers – generations of fearless women who, for thousands of years, have held their breath and plunged to the seabed in search of scallops, abalone, sea urchins and sea snails. Scott Campbell, theweek, 23 Dec. 2024 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 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 23 Jan. 2025.

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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