Hypoxic

Adjective

1. Of, pertaining to, or suffering from hypoxia.

   "Chronic obstructive pulmonary disease had left her hypoxic and wheezing."

2. Describing a breathing gas mixture that contains less than 21% oxygen.

   "Rarely, nitrox mixtures are intentionally hypoxic, under special conditions."

3. Exhibiting hypoxia.

   "Dead zones are hypoxic areas in the world's oceans and large lakes."