A kind of gas made by forcing air through a volatile hydrocarbon, such as the lighter petroleums. The air is so saturated with combustible vapour as to be a convenient illuminating and heating agent.

coal tar

A bituminous or hydrogenous coal yielding a high proportion of volatile material, and therefore available for the manufacture of illuminating gas.

A gasworks apparatus within which gas from the condenser is brought in contact with a falling stream of water, to precipitate the tar remaining in it.

Water through which gas has been passed for purification, and used for the manufacture of sal ammoniac, carbonate of ammonia, and Prussian blue.

(physics) A gas composed of a large number of fermions.

A mixture of toxic and non-toxic gases produced and collected in sewage systems by the decomposition of organic household or industrial wastes.

A kind of oil gas formerly used for lighting railroad cars, which carried it in compressed form.

Synonym of hit the gas

(informal, Canada and US, often hyphenated (especially when used attributively)) The criminal act of driving away from a gasoline station without paying after filling one's gas tank.