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  • English Word Hydration Definition The act of becoming, or state of being, a hydrate.
  • English Word Hydraulic Definition Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water; as, an hydraulic clock, crane, or dock.
  • English Word Hydraulical Definition Hydraulic.
  • English Word Hydraulicon Definition An ancient musical instrument played by the action of water; a water organ.
  • English Word Hydraulics Definition That branch of science, or of engineering, which treats of fluids in motion, especially of water, its action in rivers and canals, the works and machinery for conducting or raising it, its use as a prime mover, and the like.
  • English Word Hydrazine Definition Any one of a series of nitrogenous bases, resembling the amines and produced by the reduction of certain nitroso and diazo compounds; as, methyl hydrazine, phenyl hydrazine, etc. They are derivatives of hydrazine proper, H2N.NH2, which is a doubled amido group, recently (1887) isolated as a stable, colorless gas, with a peculiar, irritating odor. As a base it forms distinct salts. Called also diamide, amidogen, (or more properly diamidogen), etc.
  • English Word Hydrencephsloid Definition Same as Hydrocephaloid.
  • English Word Hydria Definition A water jar; esp., one with a large rounded body, a small neck, and three handles. Some of the most beautiful Greek vases are of this form.
  • English Word Hydriad Definition A water nymph.
  • English Word Hydric Definition Pertaining to, or containing, hydrogen; as, hydric oxide.
  • English Word Hydride Definition A compound of the binary type, in which hydrogen is united with some other element.
  • English Word Hydriform Definition Having the form or structure of a hydra.
  • English Word Hydrina Definition The group of hydroids to which the fresh-water hydras belong.
  • English Word Hydriodate Definition Same as Hydriodide.
  • English Word Hydriodic Definition Pertaining to, or derived from, hydrogen and iodine; -- said of an acid produced by the combination of these elements.
  • English Word Hydriodide Definition A compound of hydriodic acid with a base; -- distinguished from an iodide, in which only the iodine combines with the base.
  • English Word Hydro- Definition Alt. of Hydr-
  • English Word Hydro-electric Definition Pertaining to, employed in, or produced by, the evolution of electricity by means of a battery in which water or steam is used.
  • English Word Hydro-extractor Definition An apparatus for drying anything, as yarn, cloth, sugar, etc., by centrifugal force; a centrifugal.
  • English Word Hydrobarometer Definition An instrument for determining the depth of the sea water by its pressure.
  • English Word Hydrobilirubin Definition A body formed from bilirubin, identical with urobilin.
  • English Word Hydrobranchiata Definition An extensive artificial division of gastropod mollusks, including those that breathe by gills, as contrasted with the Pulmonifera.
  • English Word Hydrobromate Definition Same as Hydrobromide.
  • English Word Hydrobromic Definition Composed of hydrogen and bromine; as, hydrobromic acid.
  • English Word Hydrobromide Definition A compound of hydrobromic acid with a base; -- distinguished from a bromide, in which only the bromine unites with the base.
  • English Word Hydrocarbon Definition A compound containing only hydrogen and carbon, as methane, benzene, etc.; also, by extension, any of their derivatives.
  • English Word Hydrocarbonaceous Definition Of the nature, or containing, hydrocarbons.
  • English Word Hydrocarbonate Definition A hydrocarbon.
  • English Word Hydrocarbonate Definition A hydrous carbonate, as malachite.
  • English Word Hydrocarbostyril Definition A white, crystalline, nitrogenous hydrocarbon, C9H9NO, obtained from certain derivatives of cinnamic acid and closely related to quinoline and carbostyril.