Definition of crustacean
: 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
Recent Examples of crustacean from the Web
The crustaceans are cooked to order and take about 30 minutes to be delivered to the table.
All baleen whales eat tiny krill, crustaceans found in all the world's oceans.
Recently however, scientists figured out that the peptide toxins in spider venom are part of a bigger biological family originally found in crustaceans---crabs and lobsters.
These are some of the most common of all trace fossils, and they were made by small crustaceans.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'crustacean'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of crustacean
CRUSTACEAN Defined for English Language Learners
Definition of crustacean for English Language Learners
: a type of animal (such as a crab or lobster) that has several pairs of legs and a body made up of sections that are covered in a hard outer shell
CRUSTACEAN Defined for Kids
Definition of crustacean for Students
: any of a large group of mostly water animals (as crabs, lobsters, and shrimps) with a body made of segments, a tough outer shell, two pairs of antennae, and limbs that are jointed
Seen and Heard
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