[{"word":"fermion","phonetic":"/ˈfɜːmɪɒn/","phonetics":[{"text":"/ˈfɜːmɪɒn/","audio":""}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"(Standard Model) Any elementary or composite particle that has half-integer spin and thus obeys Fermi–Dirac statistics and the Pauli exclusion principle (equivalently, a particle for which the wavefunction of any system of identical such particles changes sign whenever two are swapped); a baryon, a lepton or a quark; (slightly more loosely) any such particle or any composite particle composed of fermions.","synonyms":[],"antonyms":[],"example":"According to the spin–statistics theorem, the wavefunction of a system of identical fermions (particles of half-integer spin) is antisymmetric under the operation of swapping any two particles."}],"synonyms":[],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/fermion"]}]