Torque


  1. A resistance to turning or twisting.
  2. Forces that produce a twisting or rotating motion.
  3. In an airplane, the tendency of the aircraft to turn (roll) in the opposite direction of rotation of the engine and propeller.
  4. In helicopters with a single, main rotor system, the tendency of the helicopter to turn in the opposite direction of the main rotor rotation.

Source: Pilot Handbook of Aeronatical Knowledge