Nitrox is any combination of Nitrogen, N2 and Oxygen, O2. See Enriched Air Nitrox, (EAN).
A combination of Nitrogen and Oxygen. Nitrox mixtures with percentages of oxygen greater than 21% are called Enriched Air Nitrox (EANx)
any mixture of nitrogen and oxygen that contains less than the 79% nitrogen as found in ordinary air.
Literally, any breathing gas consisting of a mixture of Nitrogen and Oxygen. Generically referred to when the Oxygen percentage in the mix is in the range of 21-50%. In diving