bottom quark

bottom quark (plural bottom quarks)

1. (particle physics) A quark having a fractional electric charge of ${\displaystyle -{\frac {1}{3}}}$ and a mass of about 4,100 to 4,400 MeV.
   Symbol: ${\displaystyle b}$

   Synonym: (dated) beauty quark

• quarks: up quark · down quark · charm quark · strange quark · top quark/truth quark · bottom quark/beauty quark ^[edit]