adjective
Definition: Relating to a large class of crustaceans that includes crabs, lobsters, and shrimp.
Example: The malacostracan species are known for their diverse habitats and adaptations.
noun
Definition: A type of crustacean that belongs to the class Malacostraca, which includes animals like crabs, shrimp, and lobsters.
Example: The malacostracan is an important part of the marine ecosystem, serving as both predator and prey.