tail-race

tailrace

[teyl-reys]
noun
1.
the race, flume, or channel leading away from a waterwheel or the like.
2.
Mining. the channel for conducting tailings or refuse away in water.

Origin:
1770–80; tail1 + race1

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
tailrace (ˈteɪlˌreɪs)
 
n
1.  Compare headrace a channel that carries water away from a water wheel, turbine, etc
2.  mining the channel for removing tailings in water

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