from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Insufficient oxygenation of the blood.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun medicine 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.


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