Dulon was a lightsaber move. The hilt's pommel would be held at one's midsection with the blade thirty degrees up, and would be brought around the back of the body and slashed at high velocity. Combining a defensive parry with a powerful attack, the dulon was a reliable counterattack to an opponent's slash aimed towards the torso.
The name dulon also referred to a solo lightsaber training exercise in which a Padawan practiced sequences of moves against imaginary opponents.