sea urchin


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

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Until recently, my answer was a giant purple sea urchin, carved out and lit from within by a little bulb. Ella Riley-adams, Vogue, "All I Want for Christmas Is a Light-Up Croissant," 3 Dec. 2018 Joint investigations by Russia and the U.S. (flown on the shuttle and tested on the Mir space station) also found that sea urchin sperm enjoyed some faster tail movement. Joe Pappalardo, Popular Mechanics, "Why There Are Sperm Swimming Around at the Space Station," 16 July 2018 The more than 400 kinds of seafood sold at the market come from all over Japan and abroad, including octopus, eel, sea urchin and other items special to Japanese cuisine. Yuri Kageyama, The Seattle Times, "Official: Move of Japan fish market could have been better," 16 Oct. 2018 Popular dishes include yellowfin tuna with sea urchin and silken tofu or Champagne lobster with French toast and Sterling caviar. Sophie Davies, Condé Nast Traveler, "29 Best Restaurants in Sydney," 14 Mar. 2018 One day Oleinik might meet with a kidney doctor about deep learning algorithms to quantify the extent of kidney damage, and another day a biologist about optimizing images of sea urchins. Cindy Atoji Keene,, "Facing a fear leads to love for the language of computing," 6 July 2018 Milton drove along the border for a bit, then dropped his net and started dragging for sea urchins in Passamaquoddy Bay. Porter Fox, WSJ, "A Seafood Hater Chases Fish in Maine," 6 June 2018 One is dressed with butter and soy sauce and tossed with pieces of sea urchin; another is sweet and simple, tangy with ketchup. New York Times, "Things to Do in NYC: Astoria for a Pool Day, and Open-Mic Night Plus Dumplings in Chinatown," 12 July 2018 At the Rubenstein Arts Center on Duke University’s campus, an image from a microscope makes an alien landscape out of the knobby, radial symmetry of a sea urchin skeleton. Marissa Fessenden, Smithsonian, "Scientific Images Make Dazzling Art In a Duke University Exhibit," 12 July 2018

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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Last Updated

9 Dec 2018

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Time Traveler for sea urchin

The first known use of sea urchin was in 1591

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More Definitions for sea urchin

sea urchin


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


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 Encyclopedia article about sea urchin

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