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the r and o in the English spelling was influenced by the Spanish tornado (past participle of tornar 'to twist, turn', from Latin torno 'to turn').

A linguistically related convective wind phenomena, that unlike the relatively small concentrated area of a tornado, is the widespread, straight-line derecho (, from , 'straight').

Definitions

A tornado is a violently rotating column of air, in contact with the ground, either pendant from a cumuliform cloud

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