Medical Definition of Chordata
: 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\play noun or adjective
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