the principle that in any system described by quantum mechanics no two identical particles having spin equal to half an odd integer can be in the same quantum state: first postulated for the electrons in atoms.
Principal vs. PrincipleIs the head of a school called a principal or a principle? These two words are frustratingly similar, leaving even the most experienced English speakers to second-guess which word means what.
Origin of exclusion principle
First recorded in 1925–30
Also called Pauli exclusion principle.
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British Dictionary definitions for exclusion principle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Science definitions for exclusion principle
[ ĭk-sklōō′zhən ]
See Pauli exclusion principle.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.