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Definition of tetrathlon noun from the Oxford Advanced American Dictionary

 

tetrathlon

 noun
noun
NAmE//tɛˈtræθlɑn//
 
, NAmE//tɛˈtræθlən//
 
 
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a sporting event in which people compete in four different sports, usually riding, shooting, swimming and running compare biathlon, decathlon, heptathlon, pentathlon, triathlon
See the Oxford Advanced Learner's Dictionary entry: tetrathlon