noun
: any of several coloring matters (as bilirubin or biliverdin) in the bile that pass on oxidation through a succession of colors useful as tests for the pigments
noun
: any of several coloring matters (as bilirubin or biliverdin) in the bile that pass on oxidation through a succession of colors useful as tests for the pigments
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012