tail·race

[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

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
tailrace (ˈteɪlˌreɪs) [Click for IPA pronunciation guide]
 
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

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Tailrace is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
the offspring of a zebra and a donkey.
Example sentences
Water from the turbine exits through the draft tube to the tailrace.
Control of the storm drain run off and sedimentation entering the tailrace.
The water continues past the propeller through the tailrace into the river past the dam.
The tailrace will return flow over a perched ledge to act as a barrier to fish migration into the tailrace.
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