from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of several eellike marine and freshwater fishes lacking a jaw and paired appendages that constitute the subphylum Agnatha. The only present-day jawless fish are the hagfish and lampreys.

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

  • n. eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms


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