carboxyhaemoglobin

/K AA0 R B AO0 K S IH1 AH0 M AA1 G L AH0 B IH0 N/
noun
  1. 1

    The stable complex of carbon monoxide with hemoglobin; it prevents the normal complexing with oxygen and thus leads to anoxia

Source: https://en.wiktionary.org/wiki/carboxyhaemoglobin, https://en.wiktionary.org/wiki/carboxyhemoglobin