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urobilin

British  
/ ˌjʊərəʊˈbaɪlɪn /

noun

  1. a brownish pigment found in faeces and sometimes in urine. It is formed by oxidation of urobilinogen , a colourless substance produced by bacterial degradation of the bile pigment bilirubin in the intestine

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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In IBD, bacteria from the Lachnospiraceae family played an important role, along with metabolites like urobilin and glycerate.

From Science Daily • Apr. 4, 2026

“Urobilinogen then spontaneously degrades into a molecule called urobilin, which is responsible for the yellow color we are all familiar with.”

From Salon • Jan. 4, 2024

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.