Definition of leptoquark in US English:

leptoquark

noun

Particle Physics
  • 1A hypothetical subatomic particle proposed as a constituent of leptons, in the way that quarks are of hadrons. nonce-use.

  • 2Any of various hypothetical subatomic particles which enable quarks and leptons to interact, or which have some qualities of both baryon and leptons.

Origin

1970s. From lepto- + quark.

Pronunciation

leptoquark

/ˈlɛptəʊkwɑːk/