(n)rotor consisting of a rotating airfoil on the tail of a single-rotor helicopter; keeps the helicopter from spinning in the direction opposite to the rotation of the main rotor, Syn.anti-torque rotor
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
n. (Aviation) The assembly of large rotating airfoils (blades) on a helicopter that produce the lift to support the helicopter in the air. [ WordNet 1.5 ]