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gal
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barometer. Antique Barometer with readout. Technology measurement, mathematics, measure atmospheric pressure
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gal

unit of gravitational measurement
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Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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History

gal, unit of acceleration, named in honour of the Italian physicist and astronomer Galileo Galilei (1564–1642) and used especially in measurements of gravity. One gal equals a change in rate of motion of one centimetre (0.3937 inch) per second per second.