(physics) the principle that two identical fermions cannot occupy the same quantum state in a body such as an atom Sometimes shortened to exclusion principle
Pauli exclusion principle
The principle that two fermions of a given type, such as electrons, protons, or neutrons, cannot occupy the same quantum state. It does not apply to bosons. This principle plays a key role in the electron orbital structure of atoms, since it prevents more than two electrons from occupying any given orbital (two are allowed, since they may have opposite spin, and thus be in different quantum states). See also orbital, degeneracy pressure.
- Paul II
noun 1. (Pietro Barbo) 1417–71, Italian ecclesiastic: pope 1464–71.
- Paul III
noun 1. (Alessandro Farnese) 1468–1549, Italian ecclesiastic: pope 1534–49. noun 1. original name Alessandro Farnese. 1468–1549, Italian ecclesiastic; pope (1534–49). He excommunicated Henry VIII of England (1538) and inaugurated the Counter-Reformation by approving the establishment of the Jesuits (1540), instituting the Inquisition in Italy, and convening the Council of Trent (1545)
[paw-leen] /pɔˈlin/ noun 1. a female given name. [paw-lahyn, -leen] /ˈpɔ laɪn, -lin/ adjective 1. of or relating to the apostle Paul or to his doctrines or writings. /ˈpɔːlaɪn/ adjective 1. relating to Saint Paul or to his doctrines fem. proper name, fem. of Paul. adj. “pertaining to the apostle Paul,” 1817, from Latin Paulinus, […]
noun, Roman Catholic Church. 1. (in canon law) the privilege given to converts to dissolve a marriage with an unbaptized spouse if either obstructs the religious practices of the other.