the world > animals > mammals > group Ungulata (hoofed) > family Equidae (general equines) > body or parts of horse > [noun] > back or types of > mark caused by saddle (3)
†(a) a circular mark on the back of a horse caused by the abrasion of the saddle (obsolete rare); (b) chiefly U.S. a metal ring fixed to a saddle…