stercobilin

from The Collaborative International Dictionary of English v.0.48
Stercobilin \Ster`co*bi"lin\, n. [L. stercus dung + E. bilin.]
   (Physiol. Chem.)
   A coloring matter found in the faeces, a product of the
   alteration of the bile pigments in the intestinal canal, --
   identical with {hydrobilirubin}.
   [1913 Webster]
    

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