hypoxemia

noun

Etymology: By surface analysis, hyp- + ox- + -emia.

1. An abnormal deficiency in the concentration of oxygen in the blood, be it the partial pressure of oxygen (mm Hg), the content of oxygen (ml oxygen per dl of blood) or the per cent saturation of the blood's hemoglobin, singly or in combination.

   “The most profound abnormality determines the oxygen deficiency category ... of hypoxemia.”