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Webster 1913 Edition
Notochord
No′to-chord
,Noun.
[Gr.
νῶτον
the back + E. chord
.] (Anat.)
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 vertebrae and the posterior part of the base of the skull are developed; the
chorda dorsalis
. See Illust. of Ectoderm
.