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

Other Words from malacostracan

malacostracan adjective

First Known Use of malacostracan

1835, in the meaning defined above

History and Etymology for malacostracan

ultimately from Greek malakostrakos soft-shelled, from malakos soft + ostrakon shell — more at mollify, oyster

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The first known use of malacostracan was in 1835

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Britannica.com: Encyclopedia article about malacostracan

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