NOTOCHORD

notochord

(noun) a flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates

Source: WordNet® 3.1

Etymology

Noun

notochord (plural notochords)

A flexible rodlike structure that forms the main support of the body in the lowest chordates; a primitive spine

A similar structure found in the embryos of vertebrates from which the spine develops

Source: Wiktionary

No"to*chord, n. Etym: [Gr. chord.] (Anat.)

Definition: An elastic cartilagelike rod which is developed beneath the medullary groove in the vertebrate embryo, and constitutes the primitive axial skeleton around which the centra of the vertebræ and the posterior part of the base of the skull are developed; the chorda dorsalis. See Illust. of Ectoderm.

Source: Webster’s Unabridged Dictionary 1913 Edition

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