a small propeller fitted to the rear of a helicopter to counteract the torque reaction of the main rotor and thus prevent the body of the helicopter from rotating in an opposite direction
adjective, adverb 1. (of a coin) with the reverse facing up: On the next toss, the coin came up tails. Compare heads. noun 2. tail1 (def 6). noun 1. the hindmost part of an animal, especially that forming a distinct, flexible appendage to the trunk. 2. something resembling or suggesting this in shape or position: […]
noun 1. a runner under the tail of an aircraft 2. a rear-wheel skid of a motor vehicle
noun, Aeronautics. 1. a runner under the tail of an airplane.
noun See tail slide