n. the quark having an electric charge ? times the electron's charge, charm quantum number of 1, and more mass than the up, down, and strange quarks. [1975–80]
charmed quark
charmed quark
[¦chärmd ′kwärk] (particle physics) A quark with an electric charge of +⅔, baryon number of ⅓, zero strangeness, and charm of +1. Symbolized c.