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Lacking substance or solidity; tenuous. "Unconnected, gaseous information." Sir J. Stephen.

Having the properties exhibited by gases under very low pressures (one millionth of an atmosphere or less). Matter under this condition, which has been termed the fourth state of matter, is sometimes called radiant matter.

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. W…

Having the form or nature of air, or of an elastic fluid; gaseous. Hence fig.: Unreal.

The science which treats of the air and other gaseous bodies under the action of force, and of their mechanical effects.

A gaseous hydrocarbon, C3H4, homologous with acetylene; propine. CH3.C.CH

A gaseous compound of hydrogen and nitrogen, NH3, with a pungent smell and taste: -- often called volatile alkali, and spirits of hartshorn.

The whole mass of aëriform fluid surrounding the earth; -- applied also to the gaseous envelope of any celestial orb, or other body; as, the atmosphere of Mars.

An inflammable gaseous hydrocarbon, C4H10, of the marsh gas, or paraffin, series.

Any one of three metameric hydrocarbons, C4H8, of the ethylene series. They are gaseous or easily liquefiable.

luminating power. [Written also carburetted.] Carbureted hydrogen gas, any one of several gaseous compounds of carbon and hydrogen, some of with make up illuminating gas. -- Light carbureted hydrogen, marsh gas, CH4; fire damp.

To become more compact; to be reduced into a denser form. Nitrous acid is gaseous at ordinary temperatures, but condenses into a very volatile liquid at the zero of Fahrenheit. H. Spencer.

The principal gaseous substance forming the solar corona, characterized by a green line in the coronal spectrum.

A gaseous prodact, formed in coal mines, old wells, pints, etc. Choke damp, a damp consisting principally of carboniCarbonic acid, under Carbonic. -- Damp sheet, a curtain in a mine gallery to direct air currents and prevent accumulation of gas. -- Fire damp, a damp consisting chiefly of light carbureted hydrogen; --…

ng through its sides at opposite points, and nearly meeting, for the purpose of exploding gaseous mixtures by an electric spark, as in gas analysis, etc.

d 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.

ion; to bubble and hiss, as fermenting liquors, or any fluid, when some part escapes in a gaseous form.

on; 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.

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

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.