Hydrometer
HYDROM'ETER, noun [See Hydrometry.] An instrument to measure the gravity, density, velocity, force, etc. of water and other fluids, and the strength of spirituous liquors.
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HYDROM'ETER, noun [See Hydrometry.] An instrument to measure the gravity, density, velocity, force, etc. of water and other fluids, and the strength of spirituous liquors.