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Consisting of, or resembling, air; having the properties of an elastic fluid; gaseous; opposed to dense or solid. The pneumatical substance being, in some bodies, the native spirit of the body. Bacon.

A heavy gaseous hydrocarbon, C3H8, of the paraffin series, occurring naturally dissolved in crude petroleum, and also made artificially; -- called also propyl hydride.

A colorless gaseous hydrocarbon (C3H6) of the ethylene series, having a garlic odor. It occurs in coal gas, and is produced artificially in various ways. Called also propene.

The act or process by which a body (whether solid, liquid, or gaseous) is absorbed into a liquid, and, remaining or becoming fluid, is diffused throughout the solvent; also, the product reulting from such absorption.

ssure. -- Diffraction spectrum, a spectrum produced by diffraction, as by a grating. -- Gaseous spectrum, the spectrum of an incandesoent gas or vapor, under moderate, or especially under very low, pressure. It is characterized by bright bands or lines. -- Normal spectrum, a representation of a spectrum arranged upo…

en also telluretted.] [Obsoles.] Tellureted hydrogen (Chem.), hydrogen telluride, H2Te, a gaseous substance analogous to hydrogen sulphide; -- called also tellurhydric acid.

A gaseous hydrocarbon, C3H6, isomeric with propylene and obtained from it indirectly. It is the base of a series of compounds analogous to the aromatic hydrocarbons.

Any substance in the gaseous, or aëriform, state, the condition of which is ordinarily that of a liquid or solid.

vided with a graduated scale, for exhibiting to the eye the changes of volume of a gas or gaseous mixture resulting from chemical action, and the like.

A solution in water of a gaseous or readily volatile substance; as, ammonia water. U. S. Pharm.

A very heavy, inert gaseous element occurring in the atmosphere in the proportion of one volume is about 20 millions. It was discovered by Ramsay and Travers in 1898. It can be condensed to a liquid boiling at -109º C., and to a solid which volatilizes without melting. Symbol Xe or X; atomic weight 130.2.…