Chordata

noun plural

Chor·​da·​ta kȯr-ˈdät-ə  -ˈdāt-ə 

: a phylum comprising animals having at least at some stage of development a more or less well-developed notochord, a dorsally situated central nervous system, and gill clefts in the walls of the pharynx and including the vertebrates, lancelets, and tunicates

chordate

ˈkȯ(ə)r-ˌdāt, ˈkȯrd-ət 

noun or adjective