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Dissociation :: Dissociation (n.) The process by which a compound body breaks up into simpler constituents; -- said particularly of the action of heat on gaseous or volatile substances; as, the dissociation of the sulphur molecules; the dissociation of ammonium chloride into hydrochloric acid and ammonia..

Eudiometry :: Eudiometry (n.) The art or process of determining the constituents of a gaseous mixture by means of the eudiometer, or for ascertaining the purity of the air or the amount of oxygen in it..

Vapor :: Vapor (n.) Any substance in the gaseous, or aeriform, state, the condition of which is ordinarily that of a liquid or solid..

Atmosphere :: Atmosphere (n.) The whole mass of aeriform fluid surrounding the earth; -- applied also to the gaseous envelope of any celestial orb, or other body; as, the atmosphere of Mars..

Gaseous :: Gaseous (a.) Lacking substance or solidity; tenuous.

Ethylene :: Ethylene (n.) A colorless, gaseous hydrocarbon, C2H4, forming an important ingredient of illuminating gas, and also obtained by the action of concentrated sulphuric acid in alcohol. It is an unsaturated compound and combines directly with chlorine and bromine to form oily liquids (Dutch liquid), -- hence called olefiant gas. Called also ethene, elayl, and formerly, bicarbureted hydrogen..

Fluorine :: Fluorine (n.) A non-metallic, gaseous element, strongly acid or negative, or associated with chlorine, bromine, and iodine, in the halogen group of which it is the first member. It always occurs combined, is very active chemically, and possesses such an avidity for most elements, and silicon especially, that it can neither be prepared nor kept in glass vessels. If set free it immediately attacks the containing material, so that it was not isolated until 1886. It is a pungent, corrosive, colorles

Ethane :: Ethane (n.) A gaseous hydrocarbon, C2H6, forming a constituent of ordinary illuminating gas. It is the second member of the paraffin series, and its most important derivatives are common alcohol, aldehyde, ether, and acetic acid. Called also dimethyl..

Ozone :: Ozone (n.) A colorless gaseous substance (O/) obtained (as by the silent discharge of electricity in oxygen) as an allotropic form of oxygen, containing three atoms in the molecule. It is a streng oxidizer, and probably exists in the air, though by he ordinary tests it is liable to be confused with certain other substances, as hydrogen dioxide, or certain oxides of nitrogen. It derives its name from its peculiar odor, which resembles that of weak chlorine..

Nebula :: Nebula (n.) A faint, cloudlike, self-luminous mass of matter situated beyond the solar system among the stars. True nebulae are gaseous; but very distant star clusters often appear like them in the telescope..

Eructation :: Eructation (n.) A violent belching out or emitting, as of gaseous or other matter from the crater of a volcano, geyser, etc..

Damp :: Damp (n.) A gaseous product, formed in coal mines, old wells, pints, etc..

Helium :: Helium (n.) A gaseous element found in the atmospheres of the sun and earth and in some rare minerals.

Acetylene :: Acetylene (n.) A gaseous compound of carbon and hydrogen, in the proportion of two atoms of the former to two of the latter. It is a colorless gas, with a peculiar, unpleasant odor, and is produced for use as an illuminating gas in a number of ways, but chiefly by the action of water on calcium carbide. Its light is very brilliant..

Effervescency :: Effervescency (n.) A kind of natural ebullition; that commotion of a fluid which takes place when some part of the mass flies off in a gaseous form, producing innumerable small bubbles; as, the effervescence of a carbonate with citric acid..

Hydropneumatic :: Hydropneumatic (a.) Pertaining to, or depending upon, both liquid and gaseous substances; as, hydropneumatic apparatus for collecting gases over water or other liquids..

Olefiant :: Olefiant (a.) Forming or producing an oil; specifically, designating a colorless gaseous hydrocarbon called ethylene..

Ozonometer :: Ozonometer (n.) An instrument for ascertaining the amount of ozone in the atmosphere, or in any gaseous mixture..

Butane :: Butane (n.) An inflammable gaseous hydrocarbon, C4H10, of the marsh gas, or paraffin, series..

Water :: Water (n.) A solution in water of a gaseous or readily volatile substance; as, ammonia water..

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