The Collaborative International Dictionary
Excretin
Excretin \Ex"cre*tin\, n. [From Excrete.] (physiol. Chem.) A nonnitrogenous, crystalline body, present in small quantity in human f[ae]ces.
Wiktionary
excretin
n. (context biochemistry dated English) A non-nitrogenous crystalline body present in small quantities in human faeces.