Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Wastewater containing bodily or other biological wastes, as from toilets, dishwashers, or kitchen drains, and kept separate from graywater in wastewater recycling systems.

from The Century Dictionary.

  • noun A disease of sheep.

from the GNU version of the Collaborative International Dictionary of English.

  • noun any of several human or animal diseases characterized by dark urine resulting from rapid breakdown of red blood cells; -- used especially of blackwater fever, a severe form of malaria caused by the blood parasite Plasmodium falciparum.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Waste water likely to contain significant quantities of fecal matter.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun any of several human or animal diseases characterized by dark urine resulting from rapid breakdown of red blood cells

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

black +‎ water

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