bottom quark

noun Physics.

the quark having electric charge −1/3 times the elementary charge and bottom quantum number −1. It is more massive than the up, down, strange, and charmed quarks.
Also called beauty quark, b quark, b-quark.

Origin of bottom quark

First recorded in 1975–80

Words nearby bottom quark

bottom land, bottom line, bottom of the barrel, bottom of the ladder, bottom out, bottom quark, bottom round, bottom time, bottom yeast, bottom-feeding, bottom-fish

Definition for b quark (2 of 2)

b quark

or b-quark

noun

Physics. bottom quark.

Scientific definitions for b quark

bottom quark
[ bŏt′əm ]

A quark with a charge of -13. Its mass 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.