Definitions for "Nitrox"
Advanced SCUBA divers may decide to extend their time / depth underwater beyond the limits of a compressed air SCUBA diver. With special training and equipment, they can safely do this with an air mixture known as Nitrox. Nitrox is a special blend of oxygen and nitrogen that the certified Nitrox diver breaths. Only advanced certified Nitrox divers with special training and equipment are permitted to use Nitrox.( 0301)
Any mixture of Oxygen and Nitrogen.
Air containing more than 21% Oxygen