air gauge

noun

variants or less commonly air gage
1
: a gauge for measuring air pressure
2
: a comparator in which the rate of escape of air between the surface under test (as that of a gun bore) and one of known curvature nearly fitting it (as that of a spindle inserted in the bore) is used as a measure of the difference between the two

Word History

First Known Use

1781, in the meaning defined at sense 1

Time Traveler
The first known use of air gauge was in 1781

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Cite this Entry

“Air gauge.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/air%20gauge. Accessed 19 Jun. 2024.

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