|1.||any arthropod of the mainly aquatic class Crustacea, typically having a carapace hardened with lime and including the lobsters, crabs, shrimps, woodlice, barnacles, copepods, and water fleas|
|2.||of, relating to, or belonging to the Crustacea|
|[C19: from New Latin crūstāceus hard-shelled, from Latin crūsta shell, |
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a chattering or flighty, light-headed person.|
|crustacean (krŭ-stā'shən) Pronunciation Key
Any of various widespread arthropods of the class Crustacea that live mostly in water and have a hard shell, a segmented body, and jointed appendages. Crustaceans include crabs, lobsters, shrimp, barnacles, and copepods.