|an instrument for comparing pressures; typically a glass U-tube containing mercury, in which pressure is indicated by the difference in levels in the two arms of the tube|
|[C18: from French manomètre, from Greek manos sparse + metron measure]|
manometer ma·nom·e·ter (mā-nŏm'ĭ-tər)
An instrument that is used for measuring the pressure of liquids and gases.
|manometer (mə-nŏm'ĭ-tər) Pronunciation Key
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An instrument used to measure the pressure exerted by liquids and gases. Pressure is exerted on one end of a U-shaped tube partially filled with liquid; the liquid is displaced upwards on the other side of the tube by a distance proportional to the pressure difference on each side of the tube.