比重计,重力计
Gravimeter \Gra*vim"e*ter\, n. [L. gravis heavy + -meter: cf. F. gravim[`e]tre.] (Physics) An instrument for ascertaining the specific gravity of bodies.
gravimeter n 1: a measuring instrument for determining the specific gravity of a liquid or solid [syn: {hydrometer}] 2: a measuring instrument for measuring variations in the gravitational field of the earth [syn: {gravity meter}]