gill arch

noun

Definition of gill arch

1 : any of the bony or cartilaginous arches or curved bars extending dorsoventrally and placed one behind the other on each side of the pharynx and supporting the gills of fishes and amphibians
2 : any of the rudimentary ridges in the embryos of all higher vertebrates that correspond to the gill arches

First Known Use of gill arch

1879, in the meaning defined at sense 1

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The first known use of gill arch was in 1879

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Cite this Entry

“Gill arch.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/gill%20arch. Accessed 22 November 2019.

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More Definitions for gill arch

gill arch

noun

Medical Definition of gill arch

: one of the bony or cartilaginous arches or curved bars extending dorsoventrally and placed one behind the other on each side of the pharynx and supporting the gills of fishes and amphibians also : branchial arch

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Britannica.com: Encyclopedia article about gill arch

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