noun mar·tin·gale \ˈmär-tən-ˌgāl, -tiŋ-\

Definition of martingale

  1. 1 :  a device for steadying a horse's head or checking its upward movement that typically consists of a strap fastened to the girth, passing between the forelegs, and bifurcating to end in two rings through which the reins pass

  2. 2a :  a lower stay of rope or chain for the jibboom used to sustain the strain of the forestays and fastened to or rove through the dolphin strikerb :  dolphin striker

  3. 3 :  any of several systems of betting in which a player increases the stake usually by doubling each time a bet is lost

Illustration of martingale

Origin and Etymology of martingale

Medieval French

First Known Use: 1584

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