Dictionary

malacostracan

noun mal·a·cos·tra·can \ˌma-lə-ˈkäs-tri-kən\

Definition of MALACOSTRACAN

:  any of a large subclass (Malacostraca) of crustaceans having a thorax consisting of eight segments usually covered by a carapace and including the decapods and isopods
malacostracan adjective

Origin of MALACOSTRACAN

ultimately from Greek malakostrakos soft-shelled, from malakos soft + ostrakon shell — more at mollify, oyster
First Known Use: 1835

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