Urea

(u-re'-ah), The chief solid constituent of urine, and principal nitrogenous end-product of ti ue-metamorphosis; a carbamid, derived mainly from the decomposition of uric acid. It was first obtained artificially in 1832 by Wohler. U. -ferment, an enzyme existing in mucous urine pa ed in inflammatory conditions of the bladder. U.,Test for, concentrate urine to syrupy consistence by evaporation, and add nitric acid. The nitrate of urea will form a crystalline precipitate of rhombic plates. with another element. id is used. In modern chemistry the suffi Uretal (u-re'-tal). Same as Ureteric. Ureter (ii-re'-ter). Th canal or tube conveying the urine from the pelvis ol the kidney to the bladder. The quantity may be accurately estimated by fowler's method, by that of Ru ell and West, by Liebig's volumetric method, or by Lyon's apparatus. See Hypobromite Method.