Definition of hemoglobin in English:


Syllabification: he·mo·glo·bin
Pronunciation: /ˈhēməˌɡlōbən
(British haemoglobin)


A red protein responsible for transporting oxygen in the blood of vertebrates. Its molecule comprises four subunits, each containing an iron atom bound to a heme group.
More example sentences
  • The key, she believes, may be the iron content of the blood and muscle proteins hemoglobin and myoglobin.
  • The main task of red blood cells is to transport oxygen bound to haemoglobin from the lungs to the tissues.
  • The red blood cells carry red blood protein called haemoglobin.


mid 19th century: a contracted form of hematoglobulin, in the same sense.

Definition of hemoglobin in:

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Word of the day demoralize
Pronunciation: dəˈmôrəˌlīz
cause (someone) to lose confidence or hope; dispirit