1. plural of autorotation; the rotation of an object (such as a helicopter or aircraft) caused by aerodynamic forces when the engine is not providing power
Usage: technical; aviation
2. plural of autorotation; the spontaneous spinning motion of certain objects or particles in response to external forces or fields
Usage: physics; technical

Examples

• The pilot trained extensively in autorotations to prepare for engine failure scenarios.
• Helicopter autorotations allow the aircraft to descend safely even without engine power.
• The autorotations of the helicopter blades generated enough lift to slow the descent.
• Emergency procedures include practicing autorotations in various weather conditions.
• The physics experiment demonstrated autorotations of spinning particles in a magnetic field.