Sludge meaning

slŭj
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Mud, mire, or ooze covering the ground or forming a deposit, as on a riverbed.
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Finely broken or half-formed ice on a body of water, especially the sea.
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An agglutination or aggregation of blood cells forming a semisolid mass that often impedes circulation.
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To agglutinate or aggregate into a semisolid mass; form a sludge. Used of blood cells.
verb
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Mud, mire, or ooze covering the ground or forming a deposit at the bottom of bodies of water.
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Spongy lumps of drift ice.
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Any heavy, slimy deposit, sediment, or mass, as the waste resulting from oil refining, the mud brought up by a mining drill, the precipitate in a sewage tank, the sediment in a steam boiler or crankcase, etc.
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(emergency medicine) A mnemonic ("salivation, lacrimation, urination, defecation, gastrointestinal upset, emesis") used to identify the common symptoms of certain affections of a cholinergic toxidrome.
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Sludge is a substance that is between solid and liquid form.

An example of sludge is a mass of mud formed in a river bed after a flood.

An example of sludge is the treated material from a sewage plant.

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Semisolid material such as the type precipitated by sewage treatment.
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Origin of sludge

  • Perhaps alteration of dialectal slutch mire

    From American Heritage Dictionary of the English Language, 5th Edition