from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of various elongated marine and freshwater fishes lacking a jaw and paired appendages, sometimes thought to constitute the taxon Agnatha. The only extant jawless fishes are the hagfishes and the lampreys.

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

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


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