notochord

noun
no·​to·​chord | \ ˈnō-tə-ˌkȯrd How to pronounce notochord (audio) \

Definition of notochord

: a longitudinal flexible rod of cells that in the lowest chordates (such as a lancelet or a lamprey) and in the embryos of the higher vertebrates forms the supporting axis of the body

Other Words from notochord

notochordal \ ˌnō-​tə-​ˈkȯr-​dᵊl How to pronounce notochord (audio) \ adjective

Examples of notochord in a Sentence

Recent Examples on the Web The tailfin and notochord — basically the sturgeon’s spine — is pulled out. oregonlive, 25 Aug. 2021 But that streak is important—it’s a notochord, or a precursor of our spinal column that marks Pikaia as one of the earliest relatives of vertebrates. Riley Black, Smithsonian Magazine, 10 Dec. 2020 But several fossils revealed that the band bore the hallmark traits of a notochord, the rubbery tube surrounding some primitive vertebrates’ spinal cords. Michael Greshko, National Geographic, 16 Mar. 2016 Instead what’s called a notochord, a flexible rod of tissue, extends along hagfish backs. Susan Milius, WIRED, 2 Mar. 2011

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'notochord.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of notochord

1848, in the meaning defined above

History and Etymology for notochord

Greek nōton, nōtos back + Latin chorda cord — more at cord

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The first known use of notochord was in 1848

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Dictionary Entries Near notochord

notocentrum

notochord

notodontid

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Cite this Entry

“Notochord.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/notochord. Accessed 28 May. 2022.

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More Definitions for notochord

notochord

noun
no·​to·​chord | \ ˈnōt-ə-ˌkȯ(ə)rd How to pronounce notochord (audio) \

Medical Definition of notochord

: a longitudinal flexible rod of cells that in the lowest chordates (as a lancelet or a lamprey) and in the embryos of the higher vertebrates forms the supporting axis of the body, that is almost obliterated in the adult of the higher vertebrates as the bodies of the vertebrae develop, and that arises as an outgrowth from the dorsal lip of the blastopore extending forward between epiblast and hypoblast in the middorsal line

Other Words from notochord

notochordal \ ˌnōt-​ə-​ˈkȯrd-​ᵊl How to pronounce notochord (audio) \ adjective

More from Merriam-Webster on notochord

Britannica.com: Encyclopedia article about notochord

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