- 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.
- a similar device that divides at the chest into two branches, each ending in a ring through which the reins pass.
- 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.
- a strap from the reins to the girth of a horse preventing it from carrying its head too high
- any gambling system in which the stakes are raised, usually doubled, after each loss
- Also called: martingale boom nautical
- a chain or cable running from a jib boom to the dolphin striker, serving to counteract strain
- another term for dolphin striker
