As a noun, instruments that measure and display something like pressure or temperature; as a verb, to estimate or measure something carefully.
From Old French gauge or jauge, possibly from Germanic roots. Originally referred to measuring standards and tools used by merchants and builders in medieval times.
The tire pressure gauges in cars work on the same principle invented in 1661—a spring that moves based on force—and that simple idea hasn't really changed in 350 years!
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