its an amotor can work at both dc or ac supplies
The stator does not move, it is stationary. The rotor is the part that revolves being supported by the shafts two end bearings.
Usually a "universal motor" means it runs on either AC or DC. It usually has brushes to accomplish this. A single phase motor is designed to run on AC only.
both gear and vane motors can be wind and water propelled.