triathlon
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noun
tri·ath·lon
\trī-ˈath-lən, -ˌlän, ÷-ˈa-thə-\
Simple Definition of triathlon
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sports : a long-distance race that has three parts (such as swimming, bicycling, and running)
Source: Merriam-Webster's Learner's Dictionary
Origin and Etymology of triathlon
tri- + -athlon (as in decathlon)
First Known Use: 1973
Learn More about triathlon
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Britannica.com: Encyclopedia article about triathlon
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