bottom quark

noun

, Physics.

1. 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.

bottom quark

/ bŏt′əm /

1. A quark with a charge of − 1 3 . 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.
2. See Table at subatomic particle

Word History and Origins

Origin of bottom quark¹

First recorded in 1975–80

Example Sentences

For instance, along with the up and down quark, there’s the charm and strange quark and, heavier still, the top and bottom quark.

From Quanta Magazine