sea urchin

noun

Definition of 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 The pupae are quite different looking like small spiky sea urchins, commonly black but sometimes a tan color. Howard Garrett, Dallas News, "Meet our favorite ladybug in disguise," 8 Jan. 2020 Otters are an important predator of sea urchins, which in turn stops the spiny creatures from growing out of control and decimating the kelp forests that many marine animals depend on for survival. Brigit Katz, Smithsonian, "Help the Shedd Aquarium Name Its Rescued Otter Pups," 25 Sep. 2019 Smelt, sardines, sea urchin, and rockfish deserve to share the spotlight with scallops and spot prawns. Naomi Tomky, Fortune, "5 Seafood Lessons I Learned From Writing a Cookbook," 16 Nov. 2019 Himitsu found fans standing in line for egg custard with ginger and sea urchin, and a twist on spiced Peking duck with baked-to-order biscuits instead of the usual pancakes. Tom Sietsema, Washington Post, "Pom Pom shakes itself free from Himitsu in Petworth," 18 Oct. 2019 Tropical fish and other marine animals, like black sea urchins, munch on fast-growing algae and seaweed that may otherwise outcompete the slow-growing coral for space. Washington Post, "Coral gardeners bring back Jamaica’s reefs, piece by piece," 3 Dec. 2019 In Hungry, Gordinier chronicles this adventure—from gathering figs in parks around Sydney to hunting for sea urchins in the Arctic Circle—with vivid prose that is sure to make your mouth water. Andrea Michelson, Smithsonian, "The Ten Best Books About Food of 2019," 26 Nov. 2019 Tropical fish and other marine animals, like black sea urchins, munch on fast-growing algae and seaweed that may otherwise outcompete the slow-growing coral for space. Christina Larson, The Denver Post, "Coral gardeners bring back Jamaica’s reefs, piece by piece," 18 Sep. 2019 Tropical fish and other marine animals, like black sea urchins, munch on fast-growing algae and seaweed that may otherwise outcompete the slow-growing coral for space. Christina Larson, San Diego Union-Tribune, "Coral gardeners bring back Jamaica’s reefs, piece by piece," 17 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sea urchin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of sea urchin

1591, in the meaning defined above

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Time Traveler for sea urchin

Time Traveler

The first known use of sea urchin was in 1591

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Statistics for sea urchin

Last Updated

21 Jan 2020

Cite this Entry

“Sea urchin.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/sea%20urchin. Accessed 23 January 2020.

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More Definitions for sea urchin

sea urchin

noun

English Language Learners Definition of sea urchin

: a small sea animal that lives on the ocean floor and is covered in sharp spines

sea urchin

noun

Kids Definition of sea urchin

: a small sea animal that is related to the starfish, lives on the sea bottom, and is enclosed in a roundish shell covered with spines that can move

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More from Merriam-Webster on sea urchin

Spanish Central: Translation of sea urchin

Nglish: Translation of sea urchin for Spanish Speakers

Britannica.com: Encyclopedia article about sea urchin

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