jack arch

noun

Definition of jack arch

: a flat arch (as a lintel with a keystone)

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History and Etymology for jack arch

jack entry 1 (something smaller)

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Cite this Entry

“Jack arch.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/jack%20arch. Accessed 17 Feb. 2020.

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