helicopters
n. countable A2 Elementary US //ˈhɛɫɪˌkɑptɝz// UK //hˈɛlɪkˌɒptəz// he·li·copters
n. aircraft with large, spinning blades on top that let them fly straight up and stay still in the air. You often see them used for rescues or by the police.
n. aircraft that derive both lift and propulsion from one or more sets of horizontally revolving overhead rotors. This design allows for vertical takeoff and landing, as well as the ability to hover in a fixed position.
The rescue helicopters land on the hospital roof.
Because they do not need a runway, helicopters are often used to transport patients from remote mountain areas to city hospitals.
Modern helicopters utilize sophisticated avionics and tail rotors to counteract the torque produced by the main blades, ensuring stability during complex maneuvers in urban environments.