rotor
UK: ˈrəʊtə | US: ˈroʊtər
n. a rotating part of a mechanical device, especially in an engine or turbine
n. the rotating assembly in a helicopter that provides lift
The word "rotor" originates from the Latin verb rotare (to turn), derived from rota (wheel). The suffix "-or" is a Latin-derived agentive suffix indicating "a thing that performs an action." Thus, "rotor" literally means "a thing that turns" or "a turning device." The term was adopted into English in the 19th century, primarily in mechanical and engineering contexts, to describe rotating components in machines. Its usage expanded with advancements in aviation (e.g., helicopter rotors).
The helicopter's rotor generates lift by spinning rapidly.
Engineers inspected the turbine rotor for signs of wear.
A damaged rotor can cause vibrations in the engine.
The drone's rotors whirred softly as it took off.
The windmill's rotor turns to harness energy from the wind.