Noun malacostracan crustacean has 1 sense
  1. malacostracan crustacean - a major subclass of crustaceans
    --1 is a kind of
    crustacean
    --1 is a member of Malacostraca, subclass Malacostraca
    --1 has particulars: krill; opossum shrimp; isopod; amphipod
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