from the GNU version of the Collaborative International Dictionary of English

  • An extensive division of Crustacea, having a dorsal shield or carapec� ��niting all, or nearly all, of the thoracic somites to the head. It includes the crabs, lobsters, shrimps, and similar species.

from The Century Dictionary and Cyclopedia

  • In some systems, a division of malacostracous crustaceans, including the podophthalmous or stalk-eyed crustaceans, as crabs, shrimps, prawns, and lobsters: nearly conterminous with Podophthalma.


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