quark

[ kwawrk, kwahrk ]
/ kwɔrk, kwɑrk /

noun

Physics. any of the hypothetical particles with spin 1/2, baryon number 1/3, and electric charge 1/3 or −2/3 that, together with their antiparticles, are believed to constitute all the elementary particles classed as baryons and mesons; they are distinguished by their flavors, designated as up (u), down (d), strange (s), charm (c), bottom or beauty (b), and top or truth (t), and their colors, red, green, and blue.Compare color(def 18), flavor(def 5), quantum chromodynamics, quark model.

QUIZZES

ELEMENTARY SCHOOL PUNCTUATION QUIZ

Punctuation marks help make writing easy to read and understand. Some of the most important ones are the period (.), comma (,), question mark (?), and exclamation point (!). How well do you know how to use them? Find out in this quiz!
Question 1 of 10
Which punctuation mark is best for this sentence? "Can I watch a movie __"

Origin of quark

coined in 1963 by U.S. physicist Murray Gell-Mann (born 1929), who associated it with a word in Joyce's Finnegans Wake, read variously as English quark croak and German Quark curd, (slang) rubbish, tripe

WORDS THAT MAY BE CONFUSED WITH quark

quark quirk
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for quarks

British Dictionary definitions for quarks (1 of 2)

quark1
/ (kwɑːk) /

noun

physics any of a set of six hypothetical elementary particles together with their antiparticles thought to be fundamental units of all baryons and mesons but unable to exist in isolation. The magnitude of their charge is either two thirds or one third of that of the electron

Word Origin for quark

C20: coined by James Joyce in the novel Finnegans Wake, and given special application in physics

British Dictionary definitions for quarks (2 of 2)

quark2
/ (kwɑːk) /

noun

a type of low-fat soft cheese

Word Origin for quark

from German
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for quarks

quark
[ kwôrk, kwärk ]

Any of a group of elementary particles supposed to be the fundamental units that combine to make up the subatomic particles known as hadrons (baryons, such as neutrons and protons, and mesons). There are six different flavors (or types) of quark: up quark, down quark, top quark, bottom quark, charm quark, and strange quark. Quarks have fractional electric charges, such as 13 the charge of an electron. See Note at elementary particle. See Table at subatomic particle.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for quarks

quarks
[ (kwahrks, kwawrks) ]

In physics, the elementary particles that make up the protons and neutrons that in turn make up the atomic nucleus. Quarks are the most basic known constituent of matter. (See antimatter.)

notes for quarks

No quarks have been seen in the laboratory because, according to current theory, they cannot exist as free particles.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.