afterbay

noun
af·​ter·​bay | \ˈaf-tər-ˌbā\
plural -s

Definition of afterbay 

: tailrace also : a reservoir into which it empties

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First Known Use of afterbay

circa 1935, in the meaning defined above

History and Etymology for afterbay

after- + bay entry 3

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The first known use of afterbay was circa 1935

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