any animal of the phylum Chordata having a notochord or spinal column

fishes; amphibians; reptiles; birds; mammals

the underpart of the body of certain vertebrates such as snakes or fish

the posterior part of the body of a vertebrate especially when elongated and extending beyond the trunk or main part of the body

tail especially of a mammal posterior to and above the anus

any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)

the part of the human torso between the neck and the diaphragm or the corresponding part in other vertebrates

an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal

higher vertebrates (reptiles, birds and mammals) possessing an amnion during development

any member of the Amniota

animal living wholly or chiefly in or on water

a vertebrate animal possessing true jaws

fishes; amphibians; reptiles; birds; mammals

the underpart of the body of certain vertebrates such as snakes or fish

the posterior part of the body of a vertebrate especially when elongated and extending beyond the trunk or main part of the body

tail especially of a mammal posterior to and above the anus

any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)

the part of the human torso between the neck and the diaphragm or the corresponding part in other vertebrates

the fluid (red in vertebrates) that is pumped through the body by the heart and contains plasma, blood cells, and platelets

(vertebrates) one of usually two organs that produce ova and secrete estrogen and progesterone

the internal skeleton; bony and cartilaginous structure (especially of vertebrates)