noun Download 🔗Share A heavy subatomic particle created by the binding of quarks by gluons; a hadron containing three quarks. Baryons have half-odd integral spin and are thus fermions. This category includes the common proton and neutron of the atomic nucleus. Examples : "The nucleus of an atom is made up of baryons, like protons and neutrons. " physics mass element science Chat with AIVocabulary GamePractice Reading