Definition of axion in English:


Line breaks: axion
Pronunciation: /ˈaksɪɒn


  • A hypothetical subatomic particle postulated to account for the rarity of processes which break charge-parity symmetry.
    More example sentences
    • Or another candidate is an even more exotic particle called the axion.
    • This has helped to promote particle-DM, with candidates such as axions, neutralinos and other cold DM particles, as well as warm DM, and self-interacting DM, whose nature is not even specified.
    • Axions, if they exist at all, do so in our ordinary dimensions, but they are stable neutral particles.


1970s: from axial + -on.

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Pronunciation: skəʊʃ
a small amount; a little