"composite particle." YourDictionary, n.d. Web. 09 April 2019. <https://www.yourdictionary.com/composite-particle>.
composite particle. (n.d.). Retrieved April 09th, 2019, from https://www.yourdictionary.com/composite-particle
A subatomic particle that is composed of two or more elementary particles. The protons and neutrons in the nucleus of an atom are composite particles, as they are composed of quarks; electrons orbiting the nucleus are not composite particles.