from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The yellow pigment responsible for the color of urine.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A pigment that causes the yellow color in urine. It is a breakdown product of the blood's haemoglobin and is removed by the kidneys.

from the GNU version of the Collaborative International Dictionary of English

  • n. A yellow urinary pigment, considered by Thudichum as the only pigment present in normal urine. It is regarded by Maly as identical with urobilin.

from The Century Dictionary and Cyclopedia

  • n. A yellow pigment of the urine.


Sorry, no etymologies found.


  • The yellow pigment of milk whey; its probable identity with urochrome, the specific yellow pigment of normal urine.

    The Vitamine Manual

  • If you are well hydrated, normal urine is clear and pale yellow, a color imparted by the pigment urochrome.

    NYT > Home Page


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