notochord

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Related to notochords: Chordates

notochord

 [no´to-kord]
a cylindrical cord of cells on the dorsal aspect of an embryo, marking its longitudinal axis; the common factor of all chordates. It is the center of development of the axial skeleton.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

no·to·chord

(nō'tō-kōrd),
1. In primitive vertebrates, the primary axial supporting structure of the body, derived from the notochordal or head process of the early embryo; an important organizer for determining the final form of the nervous system and related structures.
2. In embryos, the axial fibrocellular cord about which the vertebral primordia develop; vestiges of it persist in the adult as the nuclei pulposi of the intervertebral discs. Synonym(s): chorda dorsalis
[G. nōtos, back, + chordē, cord, string]
Farlex Partner Medical Dictionary © Farlex 2012

notochord

(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.

no′to·chord′al adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

no·to·chord

(nō'tō-kōrd)
1. In primitive vertebrates, the primary axial supporting structure of the body, derived from the notochordal or head process of the early embryo; an important organizer for determining the final form of the nervous system and related structures.
2. In embryos, the axial fibrocellular cord about which the vertebral primordia develop; vestiges of it persist in the adult as the nuclei pulposi of the intervertebral discs.
[G. nōtos, back, + chordē, cord, string]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

notochord

A rod-like structure, present in early development, derived from the MESODERM and giving rise to the spine. In the adult, the notochord is represented by the pulpy centres (nucleus pulposus) of the intervertebral discs.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

notochord

the longitudinal axial support (skeleton) of the embryos of all chordates, which lies ventral to the nerve cord and dorsal to the alimentary canal. Remnants of the notochord usually remain in the adult between the vertebrae, which come to surround it.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

no·to·chord

(nō'tō-kōrd)
In embryos, the axial fibrocellular cord about which vertebral primordia develop; vestiges persist in the adult as the nuclei pulposi of the intervertebral discs.
[G. nōtos, back, + chordē, cord, string]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
embryos treated###Compounds Added (Developmental stage)###Compounds Removed (Developmental stage)###Total time of treatment notochord?
However, there was no report prior to this study about VPA as inducer of notochord abnormalities in zebrafish or any other model organism.
This mean that notochord abnormalities observed in treated embryos were attributed only to structure analogues of VPA synthesized in this study not the VPA itself.4- 2-(2-propylpentanamido) benzoic acid (V-AA) affected the notochord cells differentiation process in zebrafish treated embryos: The notochord cells in zebrafish are specified during gastrulation around 6 hp.
The undulation of notochord in V-AA treated zebrafish embryos was only observed when the embryos were exposed to V-AA between during 6 - 24 hpf (Table IV; Fig.
5- VPA derivatives treatment altered not only morphology but also the number of notochord cells in zebrafish embryos: In order to examine whether VPA derivatives treatment modulated the notochord cell morphology or proliferation, treated embryos were fixed at 5 days post fertilization and processed for histology.
Subtyping in chordomas and the fetal notochord: an immunohistochemical analysis of aberrant expression.
Intraosseous benign notochord cell tumors (BNCT): further evidence supporting a relationship to chordoma.
The diameter of the notochord follows the general body taper and, for a B.
Amphioxus notochord Hb, with its high oxygen-binding affinity in situ and hyperbolic oxygen saturation curve, may facilitate diffusion of oxygen into the notochord cells (10).
Observations on the function and physiological properties of a fast paramyosin muscle - the notochord of amphioxus (Branchiostoma lanceolatum).
The connection between spinal cord and notochord in amphioxus (Branchiostoma lanceolatum).
The role of the notochord in forward and reverse swimming and burrowing in the amphioxus Branchiostoma lanceolatum.