[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/dictionaries/school/w/cd.html)

[home](https://md.mova.elamur.ai/free/en/) / [dictionaries](https://md.mova.elamur.ai/free/en/dictionaries/) / [The school dictionary](https://md.mova.elamur.ai/free/en/dictionaries/school/) / cd

[← C](https://md.mova.elamur.ai/free/en/dictionaries/school/C/)

# cd

«cd» in Mova's school dictionary: **a thin, shiny, round plastic disc that stores music or…** — its meaning for a pupil, its sense in the lessons and examples, with 1 sentence of Mova's corpora that use it.

### part of speech

abbreviation (CD, CDs; cd)

### meaning for a pupil

1) A CD (compact disc) is a thin, shiny, round plastic disc that stores music or computer data, read by a laser. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cd/#m1)

2) (computing) «cd» is a command for «change directory»: it moves you to another folder in a terminal. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cd/#m2)

3) (science) «cd» is the symbol for the candela, the unit of light brightness. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cd/#m3)

4) Other meanings in context: CD can mean «certificate of deposit» (money) or «corps diplomatique» (diplomat's car sign). [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cd/#m4)

### sense in the lessons

In everyday life CDs were used for music and games before streaming; many families still have them. In computing and coding lessons, «cd» is one of the first terminal commands. In history of technology, the CD followed records and cassettes. Phrases: «burn a CD», «CD player».

### examples

- Grandad still listens to music on CDs. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cd/#x1)
- Put the CD in the player and press play. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cd/#x2)
- The CD was scratched, so it kept skipping. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cd/#x3)
- Type «cd Documents» to go into the Documents folder. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cd/#x4)
- Our class made a CD of our songs. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cd/#x5)
- A CD is read by a laser beam. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cd/#x6)

### note

Usually capitals: CD; plural CDs (no apostrophe). Say each letter: «see-dee». In computing it is small letters: cd. «Disc» with a c is used for CDs and DVDs.

### In the corpora

- [One hole the size of a CD opens a whole street for it.](https://md.mova.elamur.ai/free/en/corpora/school/biology/285-what-a-child-can-do-for-nature/3/)

### Trees and pragmatics

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