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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Beautiful glasses are filled with Salina’s fruity whites, and bijoux copper pans with creamy mashed potatoes and sea urchins. Rosalyn Wikeley, Condé Nast Traveler, 10 Jan. 2026 Adley, who at Marigold rotates dishes regularly, is enticing diners to Heretik with a chicken operation and shellfish, oysters and sea urchins. Miguel Otárola, Denver Post, 6 Jan. 2026 Slide into a booth and prepare for your taste buds to dance over crusty rosemary and focaccia shellacked with tomato and sea urchin butter, and flaky halibut adorned with marigolds and tangy mushrooms. Kristin Braswell, Travel + Leisure, 5 Jan. 2026 On a recent trip, we were given a bonus piece of uni, a sweet sea urchin packed into a seaweed blanket and served with a dollop of wasabi. John Metcalfe, Mercury News, 24 Dec. 2025 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

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Cite this Entry

“Sea urchin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sea%20urchin. Accessed 13 Jan. 2026.

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

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