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Meaning of up quark | Babel Free

Noun CEFR B2

Definitions

A quark having a fractional electric charge of +2/3 and a mass of about 1.5 to 4 MeV.
particle
A quark having a fractional electric charge of +2/3 and a mass of about 1.5 to 4 MeV. Symbol: u
particle
Symbol: u
particle

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

up round up shit creek up someone's alley up someone's ass up someone's strasse up someone's street