noun🔗Share陽子A positively charged subatomic particle forming part of the nucleus of an atom and determining the atomic number of an element, composed of two up quarks and a down quark."The hydrogen atom has only one proton in its nucleus. "水素原子の原子核には陽子が1つだけあります。physicselementchemistryscienceChat with AIVocabulary GamePractice Reading