crustacean
noun
crus·ta·cean
ˌkrə-ˈstā-shən 
: any of a large class (Crustacea) of mostly aquatic mandibulate arthropods that have a chitinous or calcareous and chitinous exoskeleton, a pair of often much modified appendages on each segment, and two pairs of antennae and that include the lobsters, shrimp, crabs, wood lice, water fleas, and barnacles
crustacean
adjective
Examples of crustacean in a Sentence
Recent Examples on the Web
The aquatic crustaceans generally inhabit vernal pools in coastal Southern California and northwestern Baja California, Mexico.
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Julie Gallant, San Diego Union-Tribune, 15 July 2025
Yet unlike Kaesong, the main economic sector on the Northern frontier is natural products and services – blueberries, vegetables, fish and crustaceans.
—Saleem H. Ali, Forbes.com, 9 July 2025
Scientists determined that the crustaceans had become trapped in the sewers some 2,000 years ago when Rome was becoming urbanized and had lived there ever since—not just below Trajan’s Forum but in an entire system of canals, drainpipes and other watery infrastructure hidden below city streets.
—Krista Langlois, Smithsonian Magazine, 7 July 2025
West Indies Salad is a crab ceviche served chilled, and its short and basic ingredient list—Gulf crabmeat, salt, pepper, vinegar, onion, vegetable oil and ice water—allows the crustacean to shine in all its unadulterated glory.
—Jennifer Stewart Kornegay, Southern Living, 5 July 2025
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Julie Gallant, San Diego Union-Tribune, 15 July 2025
Yet unlike Kaesong, the main economic sector on the Northern frontier is natural products and services – blueberries, vegetables, fish and crustaceans.
—Saleem H. Ali, Forbes.com, 9 July 2025
Scientists determined that the crustaceans had become trapped in the sewers some 2,000 years ago when Rome was becoming urbanized and had lived there ever since—not just below Trajan’s Forum but in an entire system of canals, drainpipes and other watery infrastructure hidden below city streets.
—Krista Langlois, Smithsonian Magazine, 7 July 2025
West Indies Salad is a crab ceviche served chilled, and its short and basic ingredient list—Gulf crabmeat, salt, pepper, vinegar, onion, vegetable oil and ice water—allows the crustacean to shine in all its unadulterated glory.
—Jennifer Stewart Kornegay, Southern Living, 5 July 2025
See All Example Sentences for crustacean
Cite this Entry
“Crustacean.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/crustacean. Accessed 26 Jul. 2025.
Copy CitationKids Definition
crustacean
noun
crus·ta·cean
ˌkrəs-ˈtā-shən
: any of a large class of mostly water-dwelling arthropods (as lobsters, shrimps, crabs, wood lice, water fleas, and barnacles) having an exoskeleton of chitin or chitin and a compound of calcium
crustacean
adjective
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