The Collaborative International Dictionary
Hydrogen \Hy"dro*gen\, n. [Hydro-, 1 + -gen: cf. F. hydrog[`e]ne. So called because water is generated by its combustion. See Hydra.] (Chem.) A gaseous element, colorless, tasteless, and odorless, the lightest known substance, being fourteen and a half times lighter than air (hence its use in filling balloons), and over eleven thousand times lighter than water. It is very abundant, being an ingredient of water and of many other substances, especially those of animal or vegetable origin. It may by produced in many ways, but is chiefly obtained by the action of acids (as sulphuric) on metals, as zinc, iron, etc. It is very inflammable, and is an ingredient of coal gas and water gas. It is standard of chemical equivalents or combining weights, and also of valence, being the typical monad. Symbol H. Atomic weight 1.
Note: Although a gas, hydrogen is chemically similar to the metals in its nature, having the properties of a weak base. It is, in all acids, the base which is replaced by metals and basic radicals to form salts. Like all other gases, it is condensed by great cold and pressure to a liquid which freezes and solidifies by its own evaporation. It is absorbed in large quantities by certain metals (esp. palladium), forming alloy-like compounds; hence, in view of quasi-metallic nature, it is sometimes called hydrogenium. It is the typical reducing agent, as opposed to oxidizers, as oxygen, chlorine, etc.
Bicarbureted hydrogen, an old name for ethylene.
Carbureted hydrogen gas. See under Carbureted.
Hydrogen dioxide, a thick, colorless liquid, H2O2, resembling water, but having a bitter, sour taste, produced by the action of acids on barium peroxide. It decomposes into water and oxygen, and is manufactured in large quantities for an oxidizing and bleaching agent. Called also oxygenated water.
Hydrogen oxide, a chemical name for water, H?O.
Hydrogen sulphide, a colorless inflammable gas, H2S, having the characteristic odor of bad eggs, and found in many mineral springs. It is produced by the action of acids on metallic sulphides, and is an important chemical reagent. Called also sulphureted hydrogen.
Usage examples of "oxygenated water".
Fortunately there were steady currents of well oxygenated water, so breathing was no problem.
In the midst of the dream, she remembered a mouse she had once seen in a physiology laboratory, perfectly content in a flask of oxygenated water, even paddling hopefully with its little front feet.
Of course, even for a bunch of squid-faces, they had pressurized vehicles that provided oxygenated water and allowed them to move on land when necessary.
Don't worrythe bubbles have sufficient oxygenated water that they can take you a good distance.
There were some rooms that should not be flooded with hyper-oxygenated water, nor be left to the gravity fluctuations of the central shaft when the ship was in space.
He watched through a broad crystal window as neodolphins raced back and forth, traversing Streaker's water-filled bridge with powerful tail thrusts, leaving trails of fizzing, hyper-oxygenated water in their wake.
Inside the plastic container was precisely thirty gallons of Lake Jesup's purest, and in that agitated but freshly oxygenated water was the fish called Queenie, flaring her fins, jawing silent fulminations.