A monoski is a single wide ski used for skiing on snow. Wikipedia

Single wide ski used for skiing. Wikipedia Disambiguation

Single wide ski used for skiing Wikidata

A type of sitski with a single ski, used by wheelchair-bound skiers in downhill skiing and para-alpine. It is paired with outriggers, ski poles that have skis attached to the bottom, instead of the pick/spike, to function as outrigger runners for the skier sitting in the monoski. Wiktionary

The snowsport involving monoskis. Wiktionary