# beryllium

/bɝˈɪɫiəm/ (US) · /bɜːɹˈɪliəm/ (UK) · CEFR C2 · Noun

Source: https://englishreference.com/word/beryllium
Updated: 2026-05-20

## Definition

a very light and strong metal that is used in some types of high-tech equipment. It is also used to make glass that is clear and strong.

For teachers: a hard, light, brittle, silvery-white metallic element with an atomic number of 4. It is notable for its high thermal conductivity and low density, making it useful in aerospace and nuclear applications.

## Examples

- Beryllium is used to make strong, light parts for airplanes.
- Engineers chose beryllium for the satellite's frame because it is both light and extremely durable.
- The unique properties of beryllium, including its ability to transmit X-rays and its high modulus of elasticity, make it an essential component in the construction of advanced medical imaging equipment.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.