English word decathlon comes from English deca-, English -athlon (Contest.)
| Dictionary entry | Language | Definition |
|---|---|---|
| deca- | English (eng) | In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10. Symbol: da. Ten. |
| -athlon | English (eng) | Contest. |
| decathlon | English (eng) | A contest in science and math proving skill.. An athletic contest consisting of ten events which includes sprinting, hurdling, jumping, and throwing over a span of two days. |