noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The excretion of urine of an abnormally dark colour, caused by the presence of melanin or other pigments or by the action of phenol, creosote, resorcin, and other coal-tar derivatives. countable, uncountable

Etymology

From melano- + -uria.

Related phrases

coal tar

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.