Dictionary

triathlon

noun tri·ath·lon \trī-ˈath-lən, -ˌlän, ÷-ˈa-thə-\

sports : a long-distance race that has three parts (such as swimming, bicycling, and running)

Full Definition of TRIATHLON

:  an athletic contest that is a long-distance race consisting of three phases (as swimming, bicycling, and running)
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Origin of TRIATHLON

tri- + -athlon (as in decathlon)
First Known Use: 1973

Rhymes with TRIATHLON

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