natural gas (LNG) Oilfield or naturally occurring gas, chiefly methane, liquefied for transportation.
reduced to a liquid state; "liquefied petroleum gas"
reduced to liquid form by heating; "a mass of molten rock"
Natural Gas (LNG) Natural gas in liquid form. Natural gas is a liquid at -162°C (-259°F) at ambient pressure.
Hydrocarbons that are gases at normal temperatures and pressures but that readily turn into liquids under moderate pressure at normal temperatures; e.g., propane and butane.