sludge
noun/slʌdʒ/
/slʌdʒ/
[uncountable]- thick, soft, wet mud or a substance that looks like it synonym slime
- There was some sludge at the bottom of the tank.
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- industrial or human waste that has been treated
- industrial sludge
- the use of sewage sludge as a fertilizer on farm land
Word Originearly 17th cent.: of uncertain origin; compare with slush.
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sludge