Bridoon 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.
... of black velvet and black plumes. Across this horse the spurred jackboots of the dead man would be slung with toes pointing to the rear. Two men, wearing black cloaks, would lead the horse by means of new handkerchiefs passed through the bridoon rings of its bridle, handkerchiefs which would become their ... — Snake and Sword - A Novel • Percival Christopher Wren