noun
crustacean
kruhs-TAY-shuhn
noun
1
A hard-shelled creature such as a crab, lobster, shrimp, or barnacle, mostly living in water.
"Lobsters and crabs are both crustaceans."
How to Use Crustacean
Learner’s notesIn plain EnglishA group of shelled sea creatures that includes crabs, lobsters, shrimp, and barnacles.
Word Forms
more crustacean comparative, crustaceans plural, most crustacean superlative
Study it as flashcards or scroll it in Flow — saved to your collection.
Test yourself on “crustacean”
A quick quiz — meaning, synonyms & usage
→
Fill the Gap
Can you complete this real example?
Lobsters and crabs are both _____.
Etymology
From the scientific name Crustacea, based on Latin crusta ("shell" or "crust") — named for their hard outer shell.