any of a large subphylum (Vertebrata) of chordate animals, including all mammals, fishes, birds, reptiles, and amphibians, characterized by a brain enclosed in a brainpan and a segmented spinal column
See vertebrate in American Heritage Dictionary 4
(vûrˈtə-brĭt, -brātˌ)
adjective
Having a backbone or spinal column.
Of or characteristic of vertebrates or a vertebrate.
noun
A member of the subphylum Vertebrata, a primary division of the phylum Chordata that includes the fishes, amphibians, reptiles, birds, and mammals, all of which are characterized by a segmented spinal column and a distinct well-differentiated head.