Lexic.us

Definition of Notochord

1. 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.

Definition of Notochord

1. n. 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.

Definition of Notochord

1. Noun. A flexible rodlike structure that forms the main support of the body in the lowest chordates; a primitive spine ¹

2. Noun. A similar structure found in the embryos of vertebrates from which the spine develops ¹

¹ Source: wiktionary.com

Definition of Notochord

1. [n -S]

Medical Definition of Notochord

1. An axial mesodermal tissue found in embryonic stages of all chordates and protochordates, often regressing as maturity is approached. Typically a rod shaped mass of vacuolated cells. It lies immediately below the nerve cord and may provide mechanical strength to the embryo. (13 Nov 1997)

Lexicographical Neighbors of Notochord

Literary usage of Notochord

Below you will find example usage of this term as found in modern and/or classical literature:

1. Report of the Annual Meeting (1899)
"On the Origin of tlie Vertebrate notochord and Pharyngeal Clefts. By AT MASTERMAN, BA, D.Sc. The three leading anatomical features of the Chordata are ..."

2. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, Literature and (1910)
"... of median dorsal surface of alimentary canal to sheath of notochord; ... I, area of adhesion between alimentary canal and sheath of notochord; r, ..."

3. A Laboratory Text-book of Embryology by Charles Sedgwick Minot (1910)
"It is probable that in mammals the notochord, when first separated from the ... This series of changes begins near the anterior end of the notochord and ..."

4. A Treatise on Comparative Embryology by Francis Maitland Balfour (1885)
"These plates together with the notochord (nc) enclosed between them form a floor ... The continuous plate, formed by them and the notochord, is known as the ..."

5. Quain's Elements of Anatomy by Jones Quain, Edward Albert Sharpey-Schäfer, George Dancer Thane (1890)
"notochord.—-Running along the bottom of the neural groove there may soon be seen, when the blastoderm is viewed from above, a linear shading, which appears ..."

6. Journal of Anatomy and Physiology by Anatomical Society of Great Britain and Ireland (1891)
"WHATEVER difference of opinion may exist among histologists concerning the origin and function of the notochord, there can be little doubt that, ..."

7. The Origin of Vertebrates by Walter Holbrook Gaskell (1908)
"Relationship between notochord and gut.—Position of unsegmented tul)e of notochord.—Origin of notochord from a median groove. It« function a« an accessory ..."

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