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biogas any gaseous fuel produced by the bacterial decomposition of organic matter, composed primarily of methane and carbon dioxide.
condense to cause to change from a gaseous to a liquid or solid state, esp. by cooling. [2/5 definitions]
deoxygenate to remove free oxygen from (a gaseous mixture or a solution).
fog a gaseous medium in which liquid particles are suspended, such as the spray or foam in some fire extinguishers. [1/8 definitions]
jet engine an engine that develops thrust by the backward expulsion of a jet of fluid or gaseous products of combustion, used esp. in aircraft.
krypton an inert gaseous chemical element that has thirty-six protons in each nucleus, used esp. as the atmosphere in high-powered light bulbs. (symbol: Kr)
neon a chemical element of the inert gas group that has ten protons in each nucleus and that is used in liquid form as a refrigerant, and in gaseous form as an atmosphere for electrical discharge lamps because it glows a brilliant orange when excited by electricity. (symbol: Ne) [1/5 definitions]
nongaseous combined form of gaseous.
solid firm and substantial; not liquid or gaseous. [1/14 definitions]
vapor a liquid or solid brought to a gaseous state by heat, a drop in pressure, or the like. [1/7 definitions]