The Collaborative International Dictionary
haemolutein
Hematoidin \Hem`a*toid"in\, n. (Physiol. Chem.) A crystalline or amorphous pigment, free from iron, formed from hematin in old blood stains, and in old hemorrhages in the body. It resembles bilirubin. When present in the corpora lutea it is called h[ae]molutein.
Wiktionary
haemolutein
n. (context obsolete English) bilirubin