English version

elementary particle in Physics topic

From Longman Dictionary of Contemporary Englishelementary particleˌelementary ˈparticle noun [countable]  technicalHP one of the types of pieces of matter including electrons, protons, and neutrons that make up atoms
Examples from the Corpus
elementary particleIt was expected that a similar equation would govern the proton, the only other supposedly elementary particle known at that time.