| sludge (def. 8). |
[sluhj] 
| 1. | mud, mire, or ooze; slush. |
| 2. | a deposit of ooze at the bottom of a body of water. |
| 3. | any of various more or less mudlike deposits or mixtures. |
| 4. | the sediment in a steam boiler or water tank. |
| 5. | broken ice, as on the sea. |
| 6. | a mixture of some finely powdered substance and water. |
| 7. | sediment deposited during the treatment of sewage. |
| 8. | Also called activated sludge. Bacteriology. sewage sediment that contains a heavy growth of microorganisms, resulting from vigorous aeration. |
| 9. | a fine, mudlike powder produced by a mining drill. |
