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malacostracan

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

Definition of malacostracan

  1. :  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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