sea urchin


: 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 Martin says Silvera loves playing with local ingredients like seaweed, avocado, citrus, sea urchin and kohlrabi, fashioning them into cheeky plays on familiar themes with unfamiliar executions and presentations. Laura Ness, The Mercury News, 13 Feb. 2024 Because rising water temperatures are changing marine habitats, causing the population of sea urchins to explode, the divers now have to swim much further out and risk encounters with poisonous snakes and octopi that have migrated from the much warmer waters of Southeast Asia. Dobrina Zhekova, Vogue, 24 Jan. 2024 There are also fragments of thin shells that probably were derived from shellfish like clams and mussels, as well as some pieces of an echinoderm (think starfish and sea urchins). John Timmer, Ars Technica, 27 Sep. 2023 The depletion of the Pacific Coast’s sunflower sea star has led sea urchins, formerly the starfish’s prey, to begin feeding on seaweed that nearby fish depend on. Condé Nast, The New Yorker, 16 Oct. 2023 But the sea urchin was warm, which tempered the flavor; instead of rice, the lobe was placed atop a rectangle of sourdough bread soaked in brown butter and soy sauce, then toasted. Tim Carman, Washington Post, 20 Dec. 2023 Others include sea cucumbers, sea urchins, coral, and other marine creatures known for their deep intellectual pursuits. Rachel Feltman, Popular Science, 22 Nov. 2023 La Maison du Pêcheur: Percé’s best restaurant has a menu offering the finest of the coast: lobster and sea urchin, arctic char, and Gaspé seafood chowder. Nina Caplan, Travel + Leisure, 28 Oct. 2023 Most closely related to sea urchins, sea stars (aka starfish), sea lilies, and sand dollars, these bottom-dwellers range from as small as one inch long up to six feet. Laura Baisas, Popular Science, 15 Nov. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'sea urchin.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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.” Dictionary, Merriam-Webster, Accessed 23 Feb. 2024.

Kids Definition

sea urchin

: 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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