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- DictionaryTail·ing/ˈtāliNG/
noun
- 1. the residue of something, especially ore: "tailings from the mine may contaminate local waterways"
- 2. the part of a beam or projecting brick or stone embedded in a wall.
noun
Materials left over after the process of separating the valuable fraction from the uneconomic fraction of an ore
In mining, tailings or tails are the materials left over after the process of separating the valuable fraction from the uneconomic fraction of an ore. Tailings are different from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed. Wikipedia