Breadcrumb Home > Dictionary > Index T Cite top quark: Meaning and Definition of Find definitions for: top' quark" Pronunciation: [key] — Physics. Physics. a heavy quark having electric charge 2/3 times the elementary charge. Also called t quark, truth quark. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. topple toprail TrendingHere are the facts and trivia that people are buzzing about. January 2021 Current Events: US News The Holocaust (1933–1945) Chinese New Year History, Meaning, and Celebrations Noble Titles and Ranks in a Monarchy The 5 Best Air Purifiers of 2020 Inaugural Trivia Related Content Daily Word Quiz: subrosa Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language