Medical Dictionary

notochord no·to·chord (nō'tə-kôrd')

  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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