black urine

black u·rine

the dark urine of melanuria or hemoglobinuria.
A clinical finding which may be pathological or nonpathological

Pathological Excess of various pigments, including homogentisic acid—e.g., methemoglobin, haemoglobin, alkaptonuria
Nonpathological Presence in the urine of cascara, iron-sorbitol-citric acid complexes, levodopa, radiocontrast media, methocarbamol, naphthol, phenols, pyrogallol, salicylates, diatrizoates
References in periodicals archive ?
For example, a dark yellow to orange color may signify the presence of bilirubin, which is indicative of liver disease and/or biliary-tract obstruction, while brown and/or black urine may be caused by the presence of melanin or homogentisic acid.
This mild disease that causes arthritis and black urine is due to a single base pair substitution at either the 690th or the 901st position of nucleotides making up the third human chromosome.