an instrument for measuring the specific gravity of a solid or liquid.
Also called gravity meter. an instrument for measuring variations in the gravitational field of the earth by detecting differences in weight of an object of constant mass at different points on the earth's surface.
An instrument used to measure variations in a gravitational field, typically by measuring the rate of acceleration of a falling body. Gravimeters are used to survey geological features with different densities beneath the Earth's surface, such as ore-laden rock or oil fields, that affect the local strength of gravity above them.
An instrument, such as a hydrometer, used to measure the specific gravity of a liquid or solid.