GNU Collaborative International Dictionary of English

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1.       
   Bridoon , n. [F. bridon, from bride; of German origin. See Bridle, n.] (Mil.) The snaffle and rein of a military bridle, which acts independently of the bit, at the pleasure of the rider. It is used in connection with a curb bit, which has its own rein.
   Campbell.
   
   1913 Webster