notochord


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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 ?
2] The Kovalevsky or neurenteric canal is defined as a canal connecting the neural tube and archenteron in the embryo, resulting from a persisting abnormal communication between the notochord and yolk sac and the amnion during an early stage of embryonic development.
Chordomas are malignant tumors originating from embryonic notochord remnants in the craniospinal axis, mostly the sacrococcygeal (50 percent) and the spheno-occipital regions (35 percent), though 15 percent can occur in the true vertebrae.
The prenatal face and brain, both stem from the same layer of the notochord, the ectoderm, and both structures occur within a very close time span of one another (Donovan-Lepore et al.
Chordoma is a malignant midline bone tumor arising from fetal notochord.
Then, tissues were sampled, including liver, gills, intestine and stomach, cartilaginous bone, dorsal bone plate, muscle, skin, and notochord.
1), including a well-developed notochord, dorsal nerve cord, and postanal tail during their free-living tadpole larval stage.
They are thought to be one of the first animals to have evolved a structure called the notochord, similar to the backbone seen in vertebrates.
In the diploid embryos; the developments of eye, pigment cells, notochord and otic placod were observed as normal.
If pharyngeal segments of primitive notochord remain connected to the endoderm in the nasopharynx, a bursa or pouch occurs which extends towards occipital bone.
Chordomas are rare bone tumors that arise from notochord remnants.
Neurenteric canal cyst is presumably the result of incomplete separation of the notochord from the foregut in embryogenesis.
Artemia is widely used during the notochord postflexion stage in marine fish hatcheries due to their ease of storage in the form of cysts, ease of handling, and suitability for bioencapsulation, but its costs are high (Sorgeloos et al.