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
These women dive year-round off Jeju Island, collecting sea urchin, abalone and other seafood from the ocean floor, descending as much as 60 feet (18 meters) beneath the surface multiple times over the course of four to five hours each day.
—
Katie Hunt, CNN Money, 7 May 2025
With fewer predators to keep them in check and little competition from other species, purple sea urchin populations exploded.
—Avery Schuyler Nunn, Smithsonian Magazine, 30 Apr. 2025
Unchecked sea urchin grazing can strip the forest into a barren, where biodiversity plummets.
—Avery Schuyler Nunn, Smithsonian Magazine, 30 Apr. 2025
With their former predators out of the picture, purple sea urchins proliferated.
—Corinne Purtill, Los Angeles Times, 17 Apr. 2025
See All Example Sentences for sea urchin
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Katie Hunt, CNN Money, 7 May 2025
With fewer predators to keep them in check and little competition from other species, purple sea urchin populations exploded.
—Avery Schuyler Nunn, Smithsonian Magazine, 30 Apr. 2025
Unchecked sea urchin grazing can strip the forest into a barren, where biodiversity plummets.
—Avery Schuyler Nunn, Smithsonian Magazine, 30 Apr. 2025
With their former predators out of the picture, purple sea urchins proliferated.
—Corinne Purtill, Los Angeles Times, 17 Apr. 2025
See All Example Sentences for sea urchin
Cite this Entry
“Sea urchin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sea%20urchin. Accessed 22 May. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share