[ noh-tuh-kawrd ]
/ ˈnoʊ təˌkɔrd /
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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.
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Origin of notochord

First recorded in 1840–50; noto- + chord1 5 (in the sense of “a cordlike anatomical structure”)


no·to·chord·al, adjectivesub·no·to·chord·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use notochord in a sentence

British Dictionary definitions for notochord

/ (ˈnəʊtəˌkɔːd) /

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

Derived forms of notochord

notochordal, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for notochord

[ nōtə-kôrd′ ]

A flexible rodlike structure that forms the main support of the body in the lowest chordates; a primitive backbone.
A similar structure in embryos of higher vertebrates, from which the spinal column develops.

Other words from notochord

no′to•chordal adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for notochord

[ nōtə-kôrd′ ]

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.