Crustacea Crustacea /krʌˈsteɪʃiə/

noun

1. Class of mandibulate arthropods including: lobsters; crabs; shrimps; woodlice; barnacles; decapods; water fleas  ( class Crustacea , Crustacea )
   class of mandibulate arthropods including: lobsters; crabs; shrimps; woodlice; barnacles; decapods; water fleas