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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..

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

Effervesce :: Effervesce (v. i.) To be in a state of natural ebullition; to bubble and hiss, as fermenting liquors, or any fluid, when some part escapes in a gaseous form..

Fluid :: Fluid (a.) Having particles which easily move and change their relative position without a separation of the mass, and which easily yield to pressure; capable of flowing; liquid or gaseous..

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..

Volumescope :: Volumescope (n.) An instrument consisting essentially of a glass tube provided 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..

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..

Gaseity :: Gaseity (n.) State of being gaseous.

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

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..

Fixation :: Fixation (n.) The act of uniting chemically with a solid substance or in a solid form; reduction to a non-volatile condition; -- said of gaseous elements.

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

Aerodynamics :: Aerodynamics (n.) The science which treats of the air and other gaseous bodies under the action of force, and of their mechanical effects..

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..

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

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

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

Butylene :: Butylene (n.) Any one of three metameric hydrocarbons, C4H8, of the ethylene series. They are gaseous or easily liquefiable..

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

Allylene :: Allylene (n.) A gaseous hydrocarbon, C3H4, homologous with acetylene; propine..

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