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Comprehensive
Dictionary Suite
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hemoglobin the protein in the red blood cells of vertebrates that carries oxygen to the tissues.
Rh factor a substance usu. present in the red blood cells that may cause severe negative reaction if transferred, as by pregnancy or blood transfusions, into a person lacking this substance.
Rh negative lacking the Rh factor in the red blood cells.
Rh positive having the Rh factor in the red blood cells.