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noun-plural. One of the grand divisions of the animal kingdom, comprising all animals that have a backbone composed of bony or cartilaginous vertebræ, 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.

A phylum or prime division of the animal kingdom, containing all those animals which have a backbone or its equivalent; the vertebrates, formerly contrasted with all other animals (Invertebrata), now ranked as one of seven or eight phyla which are severally contrasted with one another.

n. fishes; amphibians; reptiles; birds; mammals

"Fish and fishermen are contained in vertebrata, while jawed fish and fishermen are contained in gnathostomata."

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