thresher
nounUK /ˈθrɛʃə/
US /ˈθrɛʃər/
A thresher is a machine or person that knocks the seeds loose from grain plants.
The farmer used a thresher to separate the wheat from the stalks.
OTHER MEANINGS
2. A thresher shark, a large shark with a very long tail that it uses to stun fish.
We saw a thresher shark swimming near the surface of the sea.
3. A person who threshes grain by hand or with a tool.
In the old days, a thresher worked all day in the barn.
4. A flail or similar tool used for beating grain.
He swung the wooden thresher to loosen the oats.