B quark
physics. bottom quark.
the quark having electric charge −1/3 times the elementary charge and bottom quantum number −1. it is more m-ssive than the up, down, strange, and charmed quarks.
bottom quark
(bŏt’əm)
a quark with a charge of – 1/3 . its m-ss is smaller than that of the top quark, but larger than that of all the other quarks. the bottom quark is sometimes referred to as the beauty quark, though this term is falling out of use. see table at subatomic particle.
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- B.r.
bills receivable. latin bancus regis (king’s bench) latin bancus reginae (queen’s bench)
- B.r.c.a.
brotherhood of railway carmen of america.
- B.r.c.s.
british red cross society.
- B.r.e.
bachelor of religious education.
- B.r.t.
brotherhood of railroad trainmen.