# micron

/ˈmaɪˌkɹɑn/ (US) · /mˈaɪkɹɒn/ (UK) · CEFR C1 · Noun

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

## Definition

a very small unit of length, equal to one millionth of a meter. It is often used to describe the size of tiny things like dust, hair, or electronic parts.

For teachers: a metric unit of length equal to one millionth of a meter (10^-6 m). Often used in technical contexts to describe the diameter of particles, the thickness of materials, or the resolution of optical instruments.

## Examples

- The filter can trap particles as small as one micron.
- The manufacturer specifies that the screen should have a resolution of at least 100 pixels per micron to ensure sharp images.
- In semiconductor manufacturing, the ability to etch features at the sub-micron scale is essential for producing the increasingly powerful microprocessors that power modern computers.

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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.