# neutrino

/nuˈtɹinoʊ/ (US) · /njuːtɹˈiːnəʊ/ (UK) · CEFR C1 · Noun

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

## Definition

a tiny particle that moves very fast and is almost impossible to stop. It is found in nature and is used in science to study things like the sun and stars.

For teachers: an elementary particle with a very small mass and no electric charge, which interacts very weakly with other matter. It is produced in nuclear reactions and is essential for understanding stellar processes and the universe's energy balance.

## Examples

- The neutrino travels through the Earth almost without slowing down.
- Scientists use massive underground detectors to observe neutrinos because they rarely interact with the material around them.
- The detection of a neutrino burst provided the first direct evidence of a supernova occurring in a distant galaxy, confirming long-standing theories about stellar collapse.

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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.