[{"Bold_text": "noun", "List Items": ["Also calledstanding martingale.part of the tack or harness of a horse, consisting of a strap that fastens to the girth, passes between the forelegs and through a loop in the neckstrap or hame, and fastens to the noseband: used to steady or hold down the horse's head.", "Also calledrunning martingale.a similar device that divides at the chest into two branches, each ending in a ring through which the reins pass.", "Nautical.a stay for a jib boom or spike bowsprit.", "a system of gambling in which the stakes are doubled or otherwise raised after each loss."]}]