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# copper

noun (copper — uncountable; coppers for coins, police officers); adjective (copper)

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

## Everyday

1. Copper is a reddish-brown metal that conducts electricity and heat very well. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#m1)
2. Copper is also a reddish-brown colour. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#m2)
3. Coppers are small brown coins (UK). [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#m3)
4. A copper is an informal British word for a police officer. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#m4)
5. A copper can also be a large metal pot, used for heating water or brewing. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#m5)

### In the lessons

In science lessons copper is used for electric wires because it is a good conductor; it turns green when it reacts with air over many years (like the Statue of Liberty). Phrases: «copper wire», «copper pipes», «copper coins».

### Examples

- Electric wires are often made of copper. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x1)
- The Statue of Liberty is green because its copper changed over time. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x2)
- She has copper-coloured hair. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x3)
- Copper is a good conductor of heat. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x4)
- Old pennies are made of copper. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x5)
- Copper pipes carry water in the house. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x6)
- The copper caught the thief (old British slang). [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x7)
- The wood flamed up splendidly under the large brewing copper, and it sighed so deeply! [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x8)

### Note

Uncountable as a metal. Its chemical symbol is Cu. The green coating is called verdigris or patina; it is not rust (only iron rusts). Never touch exposed copper wires; electricity is dangerous.

## On Mova

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