Definition of tourniquet noun from the Oxford Advanced Learner's Dictionary

 

tourniquet

 noun
noun
BrE BrE//ˈtʊənɪkeɪ//
 
; NAmE NAmE//ˈtɜːrnəkət//
 
Medical equipment
 
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a piece of cloth, etc. that is tied tightly around an arm or a leg to stop the loss of blood from a wound Apply a tight tourniquet above the wound. See related entries: Medical equipment Word Origin late 17th cent.: from French, probably from Old French tournicle ‘coat of mail’, influenced by tourner ‘to turn’.
See the Oxford Advanced American Dictionary entry: tourniquet