1) Gravitational instrument 2) Hydrometer 3) Measuring device 4) Measuring instrument 5) Measuring system 1) Hydrometer 2) Salinometer 3) Thermogravimeter 4) Thermohydrometer 
A gravimeter is an instrument used in gravimetry for measuring the local gravitational field of the Earth. A gravimeter is a type of accelerometer, specialized for measuring the constant downward acceleration of gravity, which varies by about 0.5% over the surface of the Earth. Though the essential principle of design is the same as in other accel...
instrument for measuring variations in gravitational fields
• (n.) An instrument for ascertaining the specific gravity of bodies.
sensitive device for measuring variations in the Earth`s gravitational field, useful in prospecting for oil and minerals. In one form, it consists of ... [3 related articles]
The Vibrating String Accelerometer (VSA) at the heart of the Apollo Traverse Gravimeter Experimeter An instrument for detecting small variations in the gravitational field of the Earth or other body, frequently used in mineral and oil prospecting, and in planetary exploration. Variations in the grav...
Synonym: hydrometer. ... Origin: L. Gravis, heavy, + G. Metron, measure ... (05 Mar 2000) ... 
Gra·vim'e·ter noun [ Latin gravis heavy + -meter : confer French gravimètre .] (Physics) An instrument for ascertaining the specific gravity of bodies. 
Type: Term Pronunciation: gră-vim′ĕ-tĕr Synonyms: hydrometer
[n] - a measuring instrument for measuring variations in the gravitational field of the earth
noun a measuring instrument for measuring variations in the gravitational field of the earth