notochord

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Related to notochords: Chordates

no·to·chord

 (nō′tə-kôrd′)
n.
A flexible rodlike structure that is present in the embryos of all chordates and in the adult forms of certain groups, such as the lancelets and hagfishes. The notochord develops into the spinal column in most vertebrates.

[Greek nōton, back + chord.]

no′to·chord′al adj.

notochord

(ˈnəʊtəˌkɔːd)
n
(Zoology) a fibrous longitudinal rod in all embryo and some adult chordate animals, immediately above the gut, that supports the body. It is replaced in adult vertebrates by the vertebral column
ˌnotoˈchordal adj

no•to•chord

(ˈnoʊ təˌkɔrd)

n.
a long, flexible, rod-shaped structure that supports the vertical axis of the body in chordates and vertebrate embryos, in the latter developing into the spinal column.
[1840–50; < Greek nôt(on) the back + Greek chordḗ cord]
no`to•chord′al, adj.

no·to·chord

(nō′tə-kôrd′)
A flexible rod-like structure that forms the main support of the body in the embryos of vertebrate animals, later developing into a true backbone. Primitive relatives of the vertebrates, known as lancelets and tunicates, only have a notochord and never develop a backbone. Animals having a notochord during some stage of their development are called chordates.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.notochord - a flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebratesnotochord - 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
urochord - a notochord of a larval tunicate typically confined to the caudal region
spinal column, spine, vertebral column, rachis, backbone, back - the series of vertebrae forming the axis of the skeleton and protecting the spinal cord; "the fall broke his back"
Translations

no·to·chord

n. notocordio, sostén fibrocelular del embrión que se convierte más tarde en la columna vertebral.
References in periodicals archive ?
All larvae in the study flexed their notochords (Table 2) between 10 and 12 days of age.
In the present study all larvae flexed their notochords between 10 and 12 days of age.
In their tadpole-like larval form, they possess stiff notochords (a structure diagnostic of chordates) that is lost in the adult form.
Neuronal induction and regional identity by co-culture of adherent human embryonic stem cells with chicken notochords and somites.
Generation of motor neurons by coculture of retinoic acid-pretreated embryonic stem cells with chicken notochords.
The notochords in untreated or mock (DMSO 1% v/v) treated embryos developed normally and were straight having well organized notochord cells (Fig.
The V-AA could not induce any abnormality in notochords, when zebrafish embryos were exposed with only for 5 h and was removed before 6 hpf (Fig.
Intervertebral vestiges, which are persistent notochords within the intervertebral disks in adults, (2) should be differentiated from BNCTs and the malignant chordoma.
For example, when gastrulating embryos are treated with LiCl, they develop reduced notochords and enhanced vegetal structures, but when treatments are given at earlier or later cleavage stages, dorsalizing and anteriorizing effects, respectively, are observed (3, 9).
This theory is promulgated on the fact that the ovum undergoes fission before the notochord develops; in most cases of conjoined twins there are separated notochords (Spencer, 1992, 2000).
The size-exclusion chromatography (SEC) elution profile at 415 nm for crude protein extract from notochords is shown in Figure 2A and from myotomes in Figure 2B.
Thick sections of ME larvae also revealed that their notochords were displaced into more anterior positions, as compared to normal larvae.