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mano-, man- (Greek: sparse, thin, rare; slack, loose; by extension, "gas, vapor").


manometer, manometric:
An instrument for measuring the pressure or tension of liquids or gases, as the blood, etc.
manoscopy:
The measurement of the density of gases.
manostat, manostatic:
Any device for automatically maintaining a constant pressure in an enclosed space.
sphygmomanometer:
An instrument for measuring blood pressure in the arteries.