Technology / Aviation / Helicopter: A wingless aircraft acquiring its lift from revolving blades driven by an engine about a near-vertical axis. A ROTORCRAFT acquiring its primary motion from engine-driven rotors that accelerate the air downward, providing a reactive lift force, or accelerate the air at an angle to the vertical, providing lift and thrust.
Entertainment / Bowling / Helicopter Shot: A type of release that is used with lighter weight balls such that the ball appears to spin similar to a top rather than roll and hook; used by many players in the Far East as an alternative to a trad MORE
Health / First Aid / Ambulance: A vehicle used to transport sick or injured people with medical needs. A prehospital emergency medical services provider tends to the sick or injured occupant during transportation. Ambulances can be MORE