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u quark

American  

noun

Physics.

  1. up quark.

Etymology

Origin of u quark

First recorded in 1975–80

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

As the u quark leaves the proton, a gluon creates a pair of virtual particles, a d quark and a d antiquark.

From Textbooks • Aug. 12, 2015

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.