air plug

noun

Definition of air plug

: a removable plug screwed into a watertight manhole or scuttle cover

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First Known Use of air plug

1864, in the meaning defined above

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Time Traveler for air plug

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The first known use of air plug was in 1864

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Cite this Entry

“Air plug.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/air%20plug. Accessed 28 Oct. 2020.

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