Haemoglobin is the red substance in blood, which combines with oxygen and carries it around thebody.
haemoglobin in British English
or US hemoglobin (ˌhiːməʊˈɡləʊbɪn, ˌhɛm-)
noun
a conjugated protein, consisting of haem and the protein globin, that gives red blood cells their characteristic colour. It combines reversibly with oxygen and is thus very important in the transportation of oxygen to tissues
See also oxyhaemoglobin
Word origin
C19: shortened from haematoglobulin, from haematin + globulin the two components
Examples of 'haemoglobin' in a sentence
haemoglobin
Tests on humans and animals are unequivocal that a higher haemoglobin boosts acute athletic performance.
Times, Sunday Times (2010)
It comes about through consuming high nitrite levels which cause the oxidation of haemoglobin.
Lashford, Stephanie The Residue Report - an action plan for safer food (1988)