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

[dictionaries](https://md.dictionary.elamur.ai/free/en/) / [English](https://md.dictionary.elamur.ai/free/en/english/) / [D](https://md.dictionary.elamur.ai/free/en/english/d/) / diameter

# diameter

noun (diameter, diameters)

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

## Everyday

1. A straight line going from one side of a circle to the other, passing through the centre. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diameter/#m1)
2. The length of that line; how wide a circle or round thing is. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diameter/#m2)

### In the lessons

In maths lessons, the diameter is twice the radius, and the circumference is about 3.14 (pi) times the diameter. In science and everyday life, the diameter of a pipe, a wheel or a planet tells its width. Phrases: in diameter.

### Examples

- The diameter of the circle is 10 cm. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diameter/#x1)
- The radius is half the diameter. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diameter/#x2)
- The Earth's diameter is about 12,700 km. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diameter/#x3)
- Measure the diameter of the pizza. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diameter/#x4)
- The pipe is 5 cm in diameter. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diameter/#x5)
- The circumference is pi times the diameter. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diameter/#x6)
- She was three feet and a half in diameter, and made of the very best gunpowder. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diameter/#x7)

### Note

In maths problems: diameter = 2 × radius; radius = diameter ÷ 2; circumference = π × diameter (about 3.14 × d). Do not confuse with «perimeter».

## In Jewish tradition

In maths lessons, the diameter is twice the radius, and the circumference is about 3.14 (pi) times the diameter. In science and everyday life, the diameter of a pipe, a wheel or a planet tells its width. Phrases: in diameter.

### Note

In maths problems: diameter = 2 × radius; radius = diameter ÷ 2; circumference = π × diameter (about 3.14 × d). Do not confuse with «perimeter».

## On Mova

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