A threshing machine or a thresher is a piece of farm equipment that separates grain seed from the stalks and husks.
It does so by beating the plant to make the seeds fall out.
Before such machines were developed, threshing was done by hand with flails: such hand threshing was very laborious and time-consuming, taking about one-quarter of agricultural labour by the 18th century.
The name combine derives from combining three separate harvesting processes:
Reaping, threshing, winnowing - combining all three operations into one led to the invention of the combine harvester, simply known as the combine.
Considered one of the most important inventions in agriculture, the combine significantly reduced manpower and sped up the harvesting process.