black mud

Definition from Wiktionary, the free dictionary
Jump to navigation Jump to search

English[edit]

English Wikipedia has an article on:
Wikipedia

Noun[edit]

black mud (countable and uncountable, plural black muds)

  1. Used other than figuratively or idiomatically: see black,‎ mud.
  2. Reduced mud found below the surface of sediments in lakes and rivers, the blackness of which is caused by the occurrence of metal sulphides.