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Meson

//ˈmɛs.ɒn// noun

Definitions

Noun
  1. 1
    The mesial plane dividing the body into similar right and left halves. regional
  2. 2
    A member of a group of subatomic particles having a mass intermediate between electrons and protons. (The most easily detected mesons fit this definition.) obsolete
  3. 3
    an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0 wordnet
  4. 4
    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.) particle, specifically

Etymology

Etymology 1

From Ancient Greek μέσον (méson, “middle”). Doublet of medium.

Etymology 2

From meso- + -on. Coined by Indian physicist Homi Bhabha in 1939, as a modification of the earlier suggestion mesotron.

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