"strange quark." YourDictionary, n.d. Web. 09 November 2018. <https://www.yourdictionary.com/strange-quark>.
strange quark. (n.d.). Retrieved November 09th, 2018, from https://www.yourdictionary.com/strange-quark
A quark with an electric charge of −1/3 and a mass of 391 electron masses, greater than that of the up quark and down quark, but smaller than that of other quarks. The presence of a strange quark contributes strangeness of −1 to the physical system containing it, while a strange antiquark contributes strangeness of +1.