[Elamur Dictionary](https://md.dictionary.elamur.ai/free/en/) · [this page in HTML](https://dictionary.elamur.ai/free/en/english/rotor/)

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# rotor

noun (a rotor, rotors)

«rotor» in the English dictionary: everyday — its meanings, how the lessons use it, and examples, each with its tree on Mova.

## Everyday

1. A rotor is a part of a machine that turns round and round, such as the blades on top of a helicopter. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/rotor/#m1)
2. A rotor is the spinning part inside an electric motor or generator. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/rotor/#m2)
3. In a wind turbine, the rotor is the hub with its blades that the wind turns. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/rotor/#m3)

### In the lessons

In science and design lessons, helicopters fly because their rotor blades push air down; a tail rotor stops the helicopter from spinning. In lessons on energy, wind turbine rotors turn a generator to make electricity. Pupils make paper «helicopters» (spinners) to test rotors and air resistance. Phrases: «rotor blades», «tail rotor», «main rotor».

### Examples

- The helicopter's rotor began to spin. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/rotor/#x1)
- The tail rotor stops the helicopter turning round. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/rotor/#x2)
- The wind turned the rotor of the turbine. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/rotor/#x3)
- Inside the motor, the rotor spins very fast. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/rotor/#x4)
- We dropped paper rotors from the stairs and timed them. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/rotor/#x5)
- Stay away from the rotor blades when the helicopter lands. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/rotor/#x6)

### Note

Countable. The word «rotor» is a palindrome: it reads the same backwards. The part of a motor that does not move is called the stator. Related words: rotate, rotation.

## On Mova

- [Trees and pragmatics of «rotor» in the school dictionary](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/rotor/): every meaning and example parsed by Mova, with its dependency tree and frames.
- [«rotor» in the school dictionary](https://mova.elamur.ai/free/en/dictionaries/school/w/rotor.html) on Mova free.