Bottom quark
WordNet
noun
(1) A quark with a charge of -1/3 and a mass about 10,000 times that of an electron
WiktionaryText
Noun
- A quark having a fractional electric charge of -1/3 and a mass about 4,100 to 4,400 MeV. Symbol: b
See also
- up quark
- down quark
- charm quark
- strange quark
- top quark / truth quark
- anti-bottom quark