crustacean
noun
any chiefly aquatic arthropod of the class Crustacea, typically having the body covered with a hard shell or crust, including the lobsters, shrimps, crabs, barnacles, and wood lice.
crustaceans
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pluralof crustacean.plural
The grammatical form denoting more than one person, place, thing, or idea.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Some specimens preserve flap-like structures on the abdomen resembling features seen in modern crustaceans such as lobsters, raising the possibility that the giant scorpion could move between water and land.
From Science Daily ● Sep. 2, 2026
The annual red crab migration, when millions of the crustaceans emerge from the forest and scramble to the ocean, is one focal point.
From The Wall Street Journal ● Aug. 22, 2026
She said they eat a mixture of food such as clams and mussels and crustaceans, so there would plenty of food around the Scottish coast.
From BBC ● Apr. 28, 2026
Instead, it has proven to be about Appalachian springsnails—and a few other rare or endangered species, including freshwater mussels, fish, and crustaceans.
From Slate ● Apr. 27, 2026
They are linked so intimately and indispensably with the lives of many fishes, mollusks, and crustaceans that were they no longer habitable these seafoods would disappear from our tables.
From "Silent Spring" by Rachel Carson
