Entry 1 sense Webster, 1913 Haemochromogen /(-krō"mō̇*jĕn)/ · Haem·o·chro·mo·gen · IPA 01 n. A body obtained from hemoglobin, by the action of reducing agents in the absence of oxygen. 1. A body obtained from hemoglobin, by the action of reducing agents in the absence of oxygen.(Physiol. Chem.)