Vertebrata
noun pluralVer·te·bra·ta | \ ˌvər-tə-ˈbrät-ə 
, -ˈbrāt- \
, -ˈbrāt- \Medical Definition of Vertebrata
: a subphylum of chordates comprising animals (as mammals, birds, reptiles, amphibians, and fishes) with a segmented spinal column together with a few primitive forms in which the backbone is represented by a notochord
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