Webster’s Revised Unabridged Dictionary · 1913
Bridoon
Bri·doon′ (brĭ·do͞on′), 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.