Adjective
(medicine) Having a normal oxygen concentration; typically 20-21% in the atmosphere, or 2-3% in physiological contexts.
Describing a breathing gas mixture that contains 21% oxygen.
Source: en.wiktionary.orgA preliminary study of the novel application of normoxic polymer gel dosimeters for the measurement of CTDI on diagnostic X-ray CT scanners. Source: Internet
Other divers question whether this proliferation of terminology is useful, and feel that the term Trimix is sufficient, modified as appropriate with the terms hypoxic, normoxic and hyperoxic, and the usual forms for indicating constituent gas fraction. Source: Internet