Sludge Sludge, n. [CF. {Slush}.] 1. Mud; mire; soft mud; slush. --Mortimer. Tennyson. [1913 Webster]

2. Small floating pieces of ice, or masses of saturated snow. --Kane. [1913 Webster]

3. (Mining) See {Slime}, 4. [1913 Webster]

4. Anything resembling mud or slush; as: (a) A muddy or slimy deposit from sweage. (b) Mud from a drill hole in boring. (c) Muddy sediment in a steam boiler. (d) Settling of cottonseed oil, used in making soap, etc. (e) A residuum of crude paraffin-oil distillation. [Webster 1913 Suppl.]

{Sludge hole}, the hand-hole, or manhole, in a steam boiler, by means of which sediment can be removed. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • sludge — [sluj] n. [var. of slutch, sludge, mud: akin to ME sluchched, muddy, prob. ult. < IE base * (s)leu , to hang limply > SLEET, MHG slote, mud, ooze] 1. mud, mire, or ooze covering the ground or forming a deposit at the bottom of bodies of… …   English World dictionary

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  • sludge — ► NOUN 1) thick, soft, wet mud or a similar viscous mixture. 2) dirty oil or industrial waste. 3) a muddy shade of brown or green. DERIVATIVES sludgy adjective. ORIGIN origin uncertain …   English terms dictionary

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