tourniquet

1. (medicine) A tightly-compressed bandage used to stop bleeding by stopping the flow of blood through a large artery in a limb.Examples: "His forefathers had been, as a rule, professional men—physicians and lawyers; his grandfather died under the walls of Chapultepec Castle while twisting a tourniquet for a cursing dragoon; an uncle remained indefinitely at Malvern Hill;[…]."; "[…] Bull was in the bathroom taking his fix, clutching his old black necktie in his teeth for a tourniquet and jabbing with the needle into his woesome arm with the thousand holes;[…]"; "After he was done, Lillehei's assistants released the tourniquet around Gregory's venae cavae, allowing blood to return."

2. (obsolete) A turnstile.obsolete