gray water

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Alternative forms[edit]


gray water (countable and uncountable, plural gray waters)

  1. Water that is not clean enough to be potable, such as having been used for washing, but not contaminated with fecal matter or other source of dangerous bacteria or dangerous or noxious materials.
    • 2020, David Farrier, “The Library of Babel”, in Footprints, 4th Estate, →ISBN:
      Its tunnels will have thinned like unhealthy arteries, before twisting and buckling under the weight of the shifting ice, slowly leaching diesel fuel, toxic chemicals like polychlorinated biphenyls, grey water and radiological waste.


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