cephalochordate

  1. Noun.  Any of the primitive fishlike creatures, of the subphylum ''Cephalochordata'', including the lancets, that lack a true spine but have a notochord which, in the case of cephalochordates, reaches into the head, contrary to the Urochordata.
  2. Adjective.  Of or pertaining to these creatures.

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This entry was last updated on RefTopia from its source on 3/20/2012.