notochordal

notochord

[noh-tuh-kawrd]
noun Embryology.
a rodlike cord of cells that forms the chief axial supporting structure of the body of the lower chordates, as amphioxus and the cyclostomes, and of the embryos of the vertebrates.

Origin:
1840–50; noto- + chord

notochordal, adjective
subnotochordal, adjective
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World English Dictionary
notochord (ˈnəʊtəˌkɔːd)
 
n
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
 
noto'chordal
 
adj

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American Heritage
Medical Dictionary

notochord no·to·chord (nō'tə-kôrd')
n.

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

  2. A similar structure in embryos of higher vertebrates, from which the spinal column develops.


no'to·chord'al adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
notochord   (nō'tə-kôrd')  Pronunciation Key 
A flexible rodlike structure that forms the main support of the body in all chordates during some stage of their development. In vertebrates, the notochord develops into a true backbone in the embryonic phase. Primitive chordates, such as lancelets and tunicates, retain a notochord throughout their lives.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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