#quark  hypothetical truly fundamental particle in mesons and baryons; there are supposed to be six flavors of quarks (and their antiquarks), which come in pairs; each has an electric charge of +2/3 or -1/3
  supertype:  elementary_particle__fundamental_particle__fundamentalparticle__subatomicparticle  a particle that is less complex than an atom; regarded as constituents of all matter
  part of:  hadron
  subtype:  bottom_quark__beauty_quark  a quark with a charge of -1/3 and a mass about 10,000 times that of an electron
  subtype:  charm_quark  a quark with an electric charge of +2/3 and a mass 2900 times that of an electron and a charm of +1
  subtype:  down_quark  a stable quark with an electric charge of -1/3 and a mass 607 times that of an electron
  subtype:  strange_quark__strangequark__squark  a quark with an electric charge of -1/3 and a mass 988 times that of an electron and a strangeness of -1
  subtype:  top_quark__topquark__truth_quark__truthquark  a hypothetical quark with a charge of +2/3 and a mass more than 100,000 times that of an electron
  subtype:  up_quark  a stable quark with an electric charge of +2/3 and a mass 607 times that of an electron

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