"antiparticle." YourDictionary, n.d. Web. 11 October 2018. <http://www.yourdictionary.com/antiparticle>.
antiparticle. (n.d.). Retrieved October 11th, 2018, from http://www.yourdictionary.com/antiparticle
A subatomic particle, such as a positron or antiproton, having the same spin, magnitude of electric charge, magnitude of magnetic moment, mass, and mean lifetime as the particle to which it corresponds, but the opposite sign of charge, opposite direction of magnetic moment, and opposite intrinsic parity.