Hydrochloric, hī-dro-klō′rik, adj. compounded of hydrogen and chlorine.—n. Hydrochlō′rate, a salt of hydrochloric acid.
Hydrocyanic, hī-dro-sī-an′ik, adj. noting an acid formed by the combination of hydrogen and cyanogen—also Prussic acid.—ns. Hydrocy′anide, Hydrocy′anite.
Hydrodynamics, hī-dro-di-nam′iks, n.pl. used as sing., the science that treats of the motions and equilibrium of a material system partly or wholly fluid, called Hydrostatics when the system is in equilibrium, Hydrokinetics when it is not.—adjs. Hydrodynam′ic, -al.—n. Hydrodynamom′eter, an instrument for measuring the velocity of fluid in motion by its pressure.—adj. Hydroelec′tric, pertaining to electricity generated by the escape of steam under high pressure.—n. Hy′dro-extract′or, an apparatus for removing moisture from yarns, cloths, &c., in process of manufacture. [Gr. hydōr, water, and dynamics.]
Hydrofluoric, hī-dro-flōō-or′ik, adj. consisting of fluorine and hydrogen.
Hydrogen, hī′dro-jen, n. a gas which in combination with oxygen produces water, an elementary gaseous substance, the lightest of all known substances, and very inflammable.—adjs. Hy′dric, containing hydrogen; Hydrog′enous, containing hydrogen: produced by the action of water, as applied to rocks in opposition to those that are pyrogenous, formed by the action of fire. [A word coined by Cavendish (1766) from Gr. hydōr, water, and genēs, producing.]
Hydrography, hī-drog′ra-fi, n. the art of measuring and describing the size and position of waters or seas: the art of making sea-charts.—n. Hydrog′rapher, a maker of sea-charts.—adjs. Hydrograph′ic, -al.—adv. Hydrograph′ically. [Gr. hydōr, water, graphein, to write.]
Hydrokinetics, hī-dro-ki-net′iks, n.pl. used as sing., a branch of Hydrodynamics (q.v.).
Hydrology, hī-drol′o-ji, n. the science which treats of water.—adjs. Hydrolog′ic, -al.—n. Hydrol′ogist. [Gr. hydōr, water, logia, a discourse.]
Hydrolysis, hī-drol′i-sis, n. a kind of chemical decomposition by which a compound is resolved into other compounds by taking up the elements of water.—adj. Hydrolyt′ic. [Gr. hydōr, water, lysis—lyein, to loose.]
Hydromancy, hī′dro-man-si, n. divination by water.—adj. Hydromant′ic. [Gr. hydōr, water, manteia, divination.]