Chem. Also -ine. [f. URO-1 + L. bīl-is bile: see IN1, and cf. F. urobiline.] A brownish resinous pigment found in the urine, and occas. in the blood.
1876. trans. Wagner’s Gen. Path. (ed. 6), 638. The urine of man constantly contains a red pigment—urobilin.
1887. Brit. Med. Jrnl., 17 Sept., 645/2. Urobiline exists in the urine either alone, or associated with bilary pigments.
