from The Century Dictionary.

  • In Illiger's classification (1811), the tenth order and also the thirtieth family of mammals, composed of the monotremes together with a certain tortoise (Pamphractus).
  • In Mollusca, those azygobranehiate gastropods which are adapted for creeping or crawling by the formation of the foot as a creeping-disk.

from the GNU version of the Collaborative International Dictionary of English.

  • noun plural (Zoöl.) A division of gastropods; the Pectinibranchiata.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun lobsters; crabs


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