[blak-waw-ter, -wot-er]

noun Pathology.

any of several human or animal diseases characterized by the production of dark urine as a result of the rapid breakdown of red blood cells.

Origin of blackwater

First recorded in 1790–1800; black + water Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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blackwater in Science



Wastewater containing bodily or other biological wastes, as from toilets, dishwashers, or kitchen drains. Compare graywater.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.