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Definition of Malacostraca
1. Noun. Largest subclass of Crustacea including most of the well-known marine, freshwater, and terrestrial crustaceans: crabs; lobsters; shrimps; sow bugs; beach flies.
Exact synonyms: Subclass Malacostraca
Group relationships: Class Crustacea, Crustacea
Member holonyms: Malacostracan Crustacean, Decapoda, Order Decapoda, Euphausiacea, Order Euphausiacea, Mysidacea, Order Mysidacea, Isopoda, Order Isopoda, Amphipoda, Order Amphipoda
Generic synonyms: Class
Group relationships: Class Crustacea, Crustacea
Member holonyms: Malacostracan Crustacean, Decapoda, Order Decapoda, Euphausiacea, Order Euphausiacea, Mysidacea, Order Mysidacea, Isopoda, Order Isopoda, Amphipoda, Order Amphipoda
Generic synonyms: Class
Definition of Malacostraca
1. n. pl. A subclass of Crustacea, including Arthrostraca and Thoracostraca, or all those higher than the Entomostraca.
Medical Definition of Malacostraca
1.