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# copper

«copper» in Mova's school dictionary: **a reddish-brown metal that conducts electricity and heat…** — its meaning for a pupil, its sense in the lessons and examples, with 5 sentences of Mova's corpora that use it.

### part of speech

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

### meaning for a pupil

1) Copper is a reddish-brown metal that conducts electricity and heat very well. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#m1)

2) Copper is also a reddish-brown colour. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#m2)

3) Coppers are small brown coins (UK). [tree →](https://md.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://md.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://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#m5)

### sense 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://md.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://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x2)
- She has copper-coloured hair. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x3)
- Copper is a good conductor of heat. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x4)
- Old pennies are made of copper. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x5)
- Copper pipes carry water in the house. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/copper/#x6)
- The copper caught the thief (old British slang). [tree →](https://md.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://md.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.

### In the corpora

- [Woodlice eat their own poo to recycle copper their bodies need and clean up the garden by eating dead leaves and wood.](https://md.mova.elamur.ai/free/en/corpora/school/biology/370-minibeasts-in-the-house-house-spiders-silverfish-woodlice-moths-and-cockroaches/11/)
- [Silver darkens, copper goes dull brown and then green, and bronze statues in the park grow green streaks.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/14-tarnish-and-how-metals-change/3/)
- [Copper slowly reacts with air and goes dull brown; vinegar with a pinch of salt makes a dull coin shiny again.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/14-tarnish-and-how-metals-change/12/)
- [Every kind of metal gives back its own colour: strontium red, barium green, sodium yellow, copper blue.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/26-colours-of-fire-fireworks/3/)
- [The colours of fireworks come from different metals: strontium gives red, barium green, sodium yellow and copper blue.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/26-colours-of-fire-fireworks/7/)

### Trees and pragmatics

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