definition of urobilinogen
â¢ UROBILINOGEN (noun) The noun UROBILINOGEN has 1 sense: 1. a chromogen formed in the intestine from the breakdown of bilirubin; yields urobilins on oxidation; some is excreted in the feces and some is resorbed and excreted in bile or urine. Familiarity information: UROBILINOGEN used as a noun is very rare. Dictionary entry details.