Down quark
WordNet
noun
(1) A stable quark with an electric charge of -1/3 and a mass 607 times that of an electron
WiktionaryText
Noun
- A quark having a fractional electric charge of -1/3 and a mass about 4 to 8 MeV. Symbol: d
See also
- up quark
- charm quark
- strange quark
- top quark / truth quark
- bottom quark / beauty quark
- anti-down quark