Definition of isospin in English:


Line breaks: iso|spin
Pronunciation: /ˈʌɪsə(ʊ)spɪn


[mass noun] Physics
  • A vector quantity or quantum number assigned to subatomic particles and atomic nuclei and having values such that similar particles differing only in charge-related properties (independent of the strong interaction between particles) can be treated as different states of a single particle.
    More example sentences
    • In short, they are similar to electric charge, isospin, and all the other internal quantum numbers of elementary particles.
    • This symmetry is related to the concept of isospin, and is not the same as charge conjugation.


1960s: contraction of isotopic spin, isobaric spin.

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a small amount; a little