In ballet, what is the act of spinning on the toe or ball of one foot 360 degrees, typically with the raised foot touching the knee of the supporting leg, called?

Pirouette is a ballet term describing an act of spinning on the toe or ball of one foot for a full turn or 360 degrees. It is typically done with the raised foot touching the knee of the supporting leg. Pirouette is of French origin meaning "to whirl about."