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# rotor

«rotor» in Mova's school dictionary: **a part of a machine that turns round and round, such as…** — its meaning for a pupil, its sense in the lessons and examples, with 2 sentences of Mova's corpora that use it.

### part of speech

noun (a rotor, rotors)

### meaning for a pupil

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://md.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://md.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://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/rotor/#m3)

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

### In the corpora

- [A helicopter's rotor blades are long thin wings that spin; the small tail rotor stops the body spinning the other way.](https://md.mova.elamur.ai/free/en/corpora/school/technology/23-airports-black-box-helicopters-drones/15/)
- [A drone flies with four or more small rotors spinning at different speeds, and some hold their place in the air using GPS.](https://md.mova.elamur.ai/free/en/corpora/school/technology/23-airports-black-box-helicopters-drones/19/)

### Trees and pragmatics

[Every meaning and example of «rotor» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/rotor/), each sentence with its dependency tree and frames.