Also called standing 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 called running 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.