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Definition of notochord
: a longitudinal flexible rod of cells that in the lowest chordates (such as a lancelet or a lamprey) and in the embryos of the higher vertebrates forms the supporting axis of the body
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Recent Examples of notochord from the Web
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But several fossils revealed that the band bore the hallmark traits of a notochord, the rubbery tube surrounding some primitive vertebrates’ spinal cords.
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Instead what’s called a notochord, a flexible rod of tissue, extends along hagfish backs.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'notochord'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of notochord
Greek nōton, nōtos back + Latin chorda cord — more at cord
Medical Dictionary
notochord
playMedical Definition of notochord
: a longitudinal flexible rod of cells that in the lowest chordates (as a lancelet or a lamprey) and in the embryos of the higher vertebrates forms the supporting axis of the body, that is almost obliterated in the adult of the higher vertebrates as the bodies of the vertebrae develop, and that arises as an outgrowth from the dorsal lip of the blastopore extending forward between epiblast and hypoblast in the middorsal line
Learn More about notochord
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Britannica.com: Encyclopedia article about notochord
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