adjective
- belonging or pertaining to the crustacean subclass Malacostraca, which includes the lobsters, shrimps, crabs, etc.
noun
- a malacostracan crustacean.
noun
- any crustacean of the subclass or group Malacostraca, including lobsters, crabs, woodlice, sand hoppers, and opossum shrimps
adjective Also: malacostracous
- of, relating to, or belonging to the Malacostraca