notochord
no·to·chord
noun \ˈnō-tə-ˌkȯrd\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
— no·to·chord·al \ˌnō-tə-ˈkȯr-dəl\ adjective
See Origin of NOTOCHORD
Greek nōton, nōtos back + Latin chorda cord — more at cord
First Known Use: 1848
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