- The oxygen-loaded form of hemoglobin, the predominant protein in red blood cells. Hemoglobin is a protein molecule that binds to oxygen. Hemoglobin forms an unstable, reversible bond with oxygen. In its oxygen-loaded form, it is called oxyhemoglobin and is bright red. In the oxygen-unloaded form it is called deoxyhemoglobin and is purple-blue.
* * *Hemoglobin in combination with oxygen, the form of hemoglobin present in arterial blood, scarlet or bright red when dissolved in water. SYN: oxygenated hemoglobin.
* * *oxy·he·mo·glo·bin or chiefly Brit oxy·hae·mo·glo·bin .äk-si-'hē-mə-.glō-bən n hemoglobin loosely combined with oxygen that it releases to the tissues
* * *oxy·he·mo·glo·bin (ok″se-heґmo-glo″bin) hemoglobin that contains bound O2, a compound formed from hemoglobin on exposure to alveolar gas in the lungs, with formation of a covalent bond with oxygen and without change of the charge of the ferrous state.
Medical dictionary. 2011.