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Rotavator (noun)
A machine with rotating blades designed to break up or till soil.
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Rototiller (noun)
a motorized cultivator having rotating blades
Wiktionary
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Rotavator (noun)
a machine with rotating blades for breaking up or tilling the soil.
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Rototiller (noun)
a motor-driven machine with rotating blades for breaking up or tilling the soil.
Oxford Dictionary