English word triathlon comes from English tri-, English -athlon (Contest.)
| 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. |
| -athlon | English (eng) | Contest. |
| triathlon | English (eng) | (historical) A former Olympic athletics event in which contestants compete in long jump, shot put, and 100-yard dash.. An athletics event in which contestants compete in swimming, cycling and running in turn.. Generally, a sports event in which contestant compete in a combination of three sports. |