urinary nitrogen

u·ri·nar·y ni·tro·gen

nitrogen excreted as urea, amino acids, uric acid, and the like, in the urine; 1 g of urinary nitrogen indicates the breakdown in the body of 6.25 g of protein.
See also: nitrogen equivalent.

u·ri·nar·y ni·tro·gen

(yūr'i-nar-ē nī'trŏ-jĕn) Any nitrogenous substance (e.g., urea, amino acids, uric acid) excreted in the urine; 1 g of urinary nitrogen indicates the breakdown in the body of 6.25 g of protein.
See also: nitrogen equivalent