meson — English Dictionary

Noun

1. The mesial plane dividing the body into similar right and left halves.

   Usage

   • Regional

Noun

1. A member of a group of subatomic particles having a mass intermediate between electrons and protons. (The most easily detected mesons fit this definition.)

   Usage

   • Obsolete

2. An elementary particle that is composed of a quark and an antiquark, such as a kaon or pion. (Mesons composed of rarer quarks are much heavier.)

   Usage

   • particle
   • specifically

Noun

1. an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0

   Synonyms

   mesotron

   Broader terms

   hadronboson