air gauge

variants: or less commonly air gage

Definition of air gauge

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

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First Known Use of air gauge

1781, in the meaning defined at sense 1

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The first known use of air gauge was in 1781

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Cite this Entry

“Air gauge.” Dictionary, Merriam-Webster, Accessed 25 Nov. 2020.

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