| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024quark /kwɔrk, kwɑrk/USA pronunciation n. [countable]- Physicsany of a group of particles smaller than the particles that make up an atom, having a fractional electric charge.
WordReference Random House Unabridged Dictionary of American English © 2024quark (kwôrk, kwärk),USA pronunciation n. - Physicsany 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. Cf. color (def. 18), flavor (def. 5), quantum chromodynamics, quark model.
- coined in 1963 by U.south, southern. physicist Murray Gell-Mann (blend of, blended 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
Collins Concise English Dictionary © HarperCollins Publishers:: quark /kwɑːk/ n - 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
Etymology: 20th Century: coined by James Joyce in the novel Finnegans Wake, and given special application in physics quark /kwɑːk/ n - a type of low-fat soft cheese
Etymology: from German |