2 definitions found From The Collaborative International Dictionary of English v.0.48 [gcide]: Vertebrata \Ver`te*bra"ta\, n. pl. [NL.] (Zool.) One of the grand divisions of the animal kingdom, comprising all animals that have a backbone composed of bony or cartilaginous vertebrae, 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. [1913 Webster] From WordNet (r) 2.0 [wn]: Vertebrata n : fishes; amphibians; reptiles; birds; mammals [syn: {subphylum Vertebrata}, {Craniata}, {subphylum Craniata}]
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