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Sludge

slʌdʒ

Sludge definitions
noun
sludge sludges
  1. thick, soft, wet mud or a similar viscous mixture of liquid and solid components, especially the product of an industrial or refining process

    "the dumping of sewage sludge"

    • dirty oil, especially in the sump of an internal combustion engine
  2. an unattractive muddy shade of brown or green

    "a sludge green"

  3. sea ice newly formed in small pieces