cup barometer


Definition of cup barometer

: a barometer consisting of a graduated glass tube about 34 inches long filled with mercury and inverted in a cup containing mercury, the column of mercury in the tube descending until balanced by the pressure of the atmosphere, its rise and fall being a measure of change of atmospheric pressure

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Cite this Entry

“Cup barometer.” Dictionary, Merriam-Webster, Accessed 17 Jan. 2021.

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