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Definition of nitrox

nitrox

/ˈnaɪ.trɑːks/
ni · trox
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nitrox Lexical Profile

nitrox Game Scores & Validity

• noun

1

A breathing gas consisting of a mixture of nitrogen and oxygen, particularly one with a higher proportion of oxygen than atmospheric air, used in scuba diving to extend bottom times and reduce the risk of decompression sickness.

Example

"Before exploring the deep shipwreck, the divers verified that their tanks were filled with nitrox to ensure a safer and longer dive."

• Nearby Words

nitrogen
nitroglycerin
nitrous
nitrox
nitwit
nitwitted
nix

Word Origin & Etymology

A portmanteau blending 'nitrogen' and 'oxygen', coined in the mid-20th century to describe artificial gas mixtures used for breathing.

Cite this Entry

Wordmom. (2026). Definition of Nitrox. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/nitrox
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