Urobilins

Part of speech: noun

Definitions

1. A group of yellow-brown pigments produced from the breakdown of bilirubin, commonly found in urine
2. Pigments that result from the metabolic process of bilirubin degradation, contributing to the coloration of urine
3. A class of compounds indicating the presence of bilirubin metabolites, often analyzed in medical diagnostics through urine samples

Etymology: "Urobilins" is simply the plural of "urobilin," the name for a family of related compounds. The singular is built from two parts: "uro-," from Greek "ouron," meaning urine, and "bilin," the chemical stem drawn from "bile," the yellowish digestive fluid made by the liver. The combination names these pigments by where they are found: they are formed when bilirubin, a breakdown product of old red blood cells, is processed by gut bacteria and then leaves the body in urine. Because the name joins the Greek for urine with the bile-derived stem, it reads almost like a map of the body's route, from liver to intestine to kidney.

Synonyms: urobilin