Definition of isospin in English:

isospin

Pronunciation /ˈīsəˌspin/ /ˈaɪsəˌspɪn/

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.

    ‘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.’

Origin

1960s contraction of isotopic spin, isobaric spin.

Pronunciation

isospin

/ˈīsəˌspin/ /ˈaɪsəˌspɪn/