the use in diving of any mixture of gases other than air; includes nitrogen-oxygen blends other than air (Nitrox) as well as combinations of oxygen with other inert gases

Fuel gas in which natural or LP gas is mixed with manufactured gas.

Any non-air mixture of gases. Generally loved by all tekkies - see tekkies.

any non-air mixture (e.g., nitrox), although some authors use the term only for mixes that contain a gas in addition to (or in place of) nitrogen (e.g., helium).

A gas in which the heating value of manufactured gas is raised by mixing it with natural or liquefied-petroleum gas.

A mixture of breathable gases other than atmospheric air.