Hydrometric pendulum, a species of hydrometer consisting of a hollow ball of ivory or metal suspended by a treated from the center of a graduated quadrant, and held in a stream to measure the velocity of the water by the inclination given to the thread; a kind of current gauge.

(Hy`dro*met"ro*graph) n. [Hydro- , 1 + Gr. measure + -graph.] An instrument for determining and recording the quantity of water discharged from a pipe, orifice, etc., in a given time.

(Hy*drom"e*try) n. [Cf. F. hydromètrique.]

1. The art of determining the specific gravity of liquids, and thence the strength of spirituous liquors, saline solutions, etc.

2. The art or operation of measuring the velocity or discharge of running water, as in rivers, etc.

(Hy`dro*mi"ca) n. [Hydro-, 1 + mica.] (Min.) A variety of potash mica containing water. It is less elastic than ordinary muscovite.

Hydromica schist(Min.), a mica schist characterized by the presence of hydromica. It often has a silky luster and almost soapy feel.

(||Hy`dro*ne*phro"sis) n. [NL., Gr. "y`dwr water + a kidney.] (Med.) An accumulation of urine in the pelvis of the kidney, occasioned by obstruction in the urinary passages.

(Hy"dro*path) n. [Cf. F. hydropathe.] A hydropathist.

(Hy`dro*path"ic Hy`dro*path"ic*al) a. Of or pertaining to hydropathy.

(Hy*drop"a*thist) n. One who practices hydropathy; a water-cure doctor.

(Hy`dro*me`te*or`o*log"ic*al) a. Of or pertaining to hydrometeorology, or to rain, clouds, storms, etc.

(Hy`dro*me`te*or*ol"o*gy) n. [Hydro-, 1 + meteorology.] That branch of meteorology which relates to, or treats of, water in the atmosphere, or its phenomena, as rain, clouds, snow, hail, storms, etc.

(Hy*drom"e*ter) n. [Hydro-, 1 + -meter: cf. F. hydromètre.]

1. (Physics) An instrument for determining the specific gravities of liquids, and thence the strength spirituous liquors, saline solutions, etc.

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.

(Hy`dro*met"ric Hy`dro*met"ric*al) a. [Cf. F. hydromètrique.]

1. Of or pertaining to an hydrometer, or to the determination of the specific gravity of fluids.

2. Of or pertaining to measurement of the velocity, discharge, etc., of running water.

3. Made by means of an hydrometer; as, hydrometric observations.

  By PanEris using Melati.

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