| urobilin | <physiology> A yellow pigment identical with hydrobilirubin, abundant in the highly coloured urine of fever, and also present in normal urine. See Urochrome. Origin: 1st uro- + bile + -in. Source: Websters Dictionary (01 Mar 1998) |
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| urobilin IX-a | Mesobilene- A bilirubinoid. See: urobilin. Synonym: urobilin IX-a. (05 Mar 2000) |
| urobilinaemia | The presence of urobilins in the blood. (05 Mar 2000) |
| urobilinogen | <chemical> A colourless compound formed in the intestines by the reduction of bilirubin. Some is excreted in the feces where it is oxidised to urobilin. Some is reabsorbed and re-excreted in the bile as bilirubin. at times, it is re-excreted in the urine, where it may be later oxidised to urobilin. Chemical name: 21H-Biline-8,12-dipropanoic acid, 2,17-diethyl-1,4,5,10,15,16,19,22,23,24-decahydro-3,7,13,18-tetramethyl-1,19-dioxo- (12 Dec 1998) |
| urobilinogen IXa | A reduced mesobilirubin with no double bonds between the pyrrole rings and, consequently, colourless. See: bilirubinoids. Synonym: mesobilirubinogen, urobilinogen IXa. (05 Mar 2000) |
| urobilinuria | The presence in the urine of urobilins in excessive amount, formed mainly from haemoglobin. (05 Mar 2000) |
| Gerhardt's test for urobilin in the urine | The urobilin is extracted with chloroform and then treated with iodine and potassium hydrate, a fluorescent green colour being produced. (05 Mar 2000) |
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