Relating to or containing hemoglobin, the protein in red blood cells that carries oxygen.
From Greek haima (blood) + Latin globus (sphere/globe) + -ic. The root reflects hemoglobin's round shape and role in transporting gases through the bloodstream.
Hemoglobin is actually deep red because each molecule contains iron, which binds oxygen—this is why blood is red and why iron deficiency literally makes your blood less red and less efficient at delivering oxygen to your cells.
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