資料來源 : pyDict

液體比重計,浮秤

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Hydrometer \Hy*drom"e*ter\, n. [Hydro-, 1 + -meter: cf. F.
   hydrom[`e]tre.]
   1. (Physics) An instrument for determining the specific
      gravities of liquids, and thence the strength spirituous
      liquors, saline solutions, etc.

   Note: It is usually made of glass with a graduated stem, and
         indicates the specific gravity of a liquid by the depth
         to which it sinks in it, the zero of the scale marking
         the depth to which it sinks in pure water. Extra
         weights are sometimes used to adapt the scale to
         liquids of different densities.

   2. An instrument, variously constructed, used for measuring
      the velocity or discharge of water, as in rivers, from
      reservoirs, etc., and called by various specific names
      according to its construction or use, as {tachometer},
      {rheometer}, {hydrometer}, {pendulum}, etc.; a current
      gauge.

資料來源 : WordNet®

hydrometer
     n : a measuring instrument for determining the specific gravity
         of a liquid or solid [syn: {gravimeter}]