animal, animate being, beast, creature, fauna, brute - a living organism characterized by voluntary movement

Chordata, phylum Chordata - comprises true vertebrates and animals having a notochord

cephalochordate - fishlike animals having a notochord rather than a true spinal column

tunicate, urochord, urochordate - primitive marine animal having a saclike unsegmented body and a urochord (a notochord) conspicuous in the larva

craniate, vertebrate - animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium