methane
meth·ane
noun\ˈmeth-ˌān, British usually ˈmē-ˌthān\
Definition of METHANE
: a colorless odorless flammable gaseous saturated hydrocarbon CH4 that is lighter than air and forms explosive mixtures with air or oxygen, that is a product of decomposition of organic matter in marshes and mines or of the carbonization of coal, and that is used as a fuel and raw material in chemical synthesis—called also marsh gas
