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See also: Thresher



From Middle English thresshere; equivalent to thresh +‎ -er. The shark's tail is thought to resemble the implement.

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thresher (plural threshers)

  1. (agriculture) Anything or anyone that threshes.
  2. (agriculture, historical) A now-obsolete hand tool for threshing, also called a flail.
  3. (agriculture) A modern farm machine for threshing grain, now a part of combine harvesters rather than a separate implement.
  4. (zoology) Any of several large pelagic sharks of the genus Alopias, which have a very long tail; more commonly called thresher sharks. [from 1880s]

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