carbonylhemoglobin

\\ˈkärbəˌnil|h-, -ēl-\ noun (-s)

Etymology: carbonyl + hemoglobin

: a very stable pinkish red combination of hemoglobin and carbon monoxide formed in the blood when carbon monoxide is inhaled with resulting loss of ability of the blood to combine with oxygen — called also carbon monoxide hemoglobin, carboxyhemoglobin