The word "bilihumin" is a bit of a challenge when it comes to spelling. In IPA phonetic transcription, it would be spelled as /bɪlɪhuːmɪn/. The tricky parts are the "-humin" ending, which might lead someone to write "-human" instead, and the pronunciation of the first syllable, which sounds like "bil" rather than "beel". Despite its complexity, "bilihumin" is a real word that refers to a specific chemical compound, highlighting the importance of accuracy in spelling even the most unusual words.
A blackish residue left after treatment of bile with various solvents.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.