| 单词 | up quark |
| 释义 | up quark in American English Particle Physics a type of quark with a mass of c. 0.002 to 0.008 GeV/c2, a positive charge that is 2⁄3 that of an electron, zero charm, and zero strangeness see also flavor (sense 5)up quark in American Englishnoun Physics the quark having electric charge 2/3 times the elementary charge and strangeness and charm equal to 0 Also called: u quark Word origin [1975–80]This word is first recorded in the period 1975–80. Other words that entered Englishat around the same time include: bench press, family therapy, gravitational lens, retrovirus, surrogate motherExamples of 'up quark' in a sentence |
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