checkrein
/ˈtʃɛkˌreɪn/
noun
- A short rein attached from a horse's bit to the saddle or harness to prevent the horse from lowering its head too much.
- The rider adjusted the checkrein to keep the horse's head in the proper position.
- The trainer explained that the checkrein should not be too tight.
- A checkrein is often used in driving horses to maintain control.