Meaning of baryon number in English:

baryon number

noun

Physics
  • A quantum number assigned to subatomic particles, equal to 1 for baryons and −1 for antibaryons (hence 1/3 for quarks and -1/3 for antiquarks), and 0 for all other particles; symbol B.

    The concept is generalized for a collection of particles, being defined as one third of the difference between the number of quarks and the number of antiquarks.

Origin

1950s; earliest use found in Nuclear Physics.