English word triathlete comes from English tri-, English athlete
| Dictionary entry | Language | Definition |
|---|---|---|
| tri- | English (eng) | (chemistry) Used in combination with a known element name (e.g. 'tri-silicon') to designate an unknown element that would reside three periods lower than the known element on a Mendeleev-type periodic table. See Mendeleev's predicted elements. Three. |
| athlete | English (eng) | (US, Canada) A person who actively participates in physical sports, especially with great skill; a sportsperson.. A participant in a group of sporting activities which includes track and field, road running, cross country running and racewalking.. An exceptionally physically fit person. |
| triathlete | English (eng) | (athletics) An athlete who competes in the triathlon. |