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Olefiant gas or ethylene; -- so called by Berzelius from its forming an oil combining with chlorine. [Written also elayle.] See Ethylene.

A swelling produced by gas or air diffused in the cellular tissue. Emphysema of the lungs, Pulmonary emphysema (Med.), a common disease of the lungs in which the air cells are distended and their partition walls ruptured by an abnormal pressure of the air contained in them.

region of heaven. Go, soar with Plato to the empyreal sphere. Pope. Empyreal air, oxygen gas.

The transmission of a fluid or gas from without inward in the phenomena, or by the process, of osmose.

The granule within the nucleolus or entoblast of a nucleated cell. Agassiz.

ke birds of the genus Æpiornis, only recently extinct. Its remains have been found in Madagascar. [Written also Æpyornis.]

One of the lateral lobes of the foot in certain gastropods.

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

s; -- used of persons or things; as, to escape from prison, from arrest, or from slavery; gas escapes from the pipes; electricity escapes from its conductors. To escape out of these meshes. Thackeray.

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.

Ethylene; olefiant gas.

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…

A yellow or greenish yellow gas, first prepared by Davy, evolved from potassium chlorate and hydrochloric acid. It is supposed to consist of chlorine tetroxide with some free chlorine.

An instrument for the volumetric measurement of gases; -- so named because frequently used to determine the purity of the air.

The art or process of determining he 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.

A large division of gastropod molluske, including the Pulmonifera and Opisthobranchiata.

Pertaining to steam, air, gas, etc., that is released from the cylinder of an engine after having preformed its work. Exhaust draught, a forced draught produced by drawing air through a place, as through a furnace, instead of blowing it through. -- Exhaust fan, a fan blower so arranged as to produce an exhaust draught…

The passage of gases, vapors, or liquids thought membranes or porous media from within outward, in the phenomena of osmose; -- opposed to endosmose. See Osmose.

To become suddenly expanded into a great volume of gas or vapor; to burst violently into flame; as gunpowder explodes.

nation; a chemical action which causes the sudden formation of a great volume of expanded gas; as, the explosion of gunpowder, of fire damp,etc.