To remove the tassel (the flowering cluster) from corn or other plants, especially in agriculture.
From de- (remove) + tassel (the flowering head of grain). This is agricultural terminology that became standardized in farming practices, especially corn breeding.
Detasseling is a real agricultural job that teenagers do in corn fields during summer! Farmers remove tassels from certain corn plants so pollen from other plants fertilizes them—it's nature controlled by humans for better crops.
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