hemoglobin
🇺🇸
/ˌhiːməˈɡləʊbɪn/
🇬🇧
/ˌhiːməˈɡləʊbɪn/
A protein in red blood cells that carries oxygen from the lungs to the rest of the body and returns carbon dioxide from the body to the lungs.
The doctor checked the patient's hemoglobin levels to determine if they had anemia.