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Vertebrata

Source : Webster's Revised Unabridged Dictionary (1913)

Vertebrata \Ver`te*bra"ta\, n. pl. [NL.] (Zo["o]l.)
   One of the grand divisions of the animal kingdom, comprising
   all animals that have a backbone composed of bony or
   cartilaginous vertebr[ae], together with Amphioxus in which
   the backbone is represented by a simple undivided notochord.
   The Vertebrata always have a dorsal, or neural, cavity above
   the notochord or backbone, and a ventral, or visceral, cavity
   below it. The subdivisions or classes of Vertebrata are
   Mammalia, Aves, Reptilia, Amphibia, Pisces, Marsipobranchia,
   and Leptocardia.

Source : WordNet®

Vertebrata
     n : fishes; amphibians; reptiles; birds; mammals [syn: {subphylum
         Vertebrata}, {Craniata}, {subphylum Craniata}]
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