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nouna flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebratestype of:
Definition that contains notochord
- invertebrate any animal lacking a backbone or notochord; the term is not used as a scientific classification
- chordata comprises true vertebrates and animals having a notochord
- urochord a notochord of a larval tunicate typically confined to the caudal region
- chordomesoderm the area of mesoderm that forms the notochord
- chordate any animal of the phylum Chordata having a notochord or spinal column
- conodont small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes
- cephalochordate fish-like animals having a notochord rather than a true spinal column
- phylum chordata comprises true vertebrates and animals having a notochord
- chordamesoderm the area of mesoderm that forms the notochord
- ascidian tadpole free-swimming larva of ascidians; they have a tail like a tadpole that contains the notochord