magic number

See synonyms for magic number on Thesaurus.com
nounPhysics.
  1. the atomic number or neutron number of an exceptionally stable nuclide.

Origin of magic number

1
First recorded in 1945–50

Words Nearby magic number

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British Dictionary definitions for magic number

magic number

noun
  1. physics any of the numbers 2, 8, 20, 28, 50, 82, and 126. Nuclides with these numbers of nucleons appear to have greater stability than other nuclides

  2. chem a number of atoms that is particularly stable in certain types of compound that have clusters of the same type of atom

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

Scientific definitions for magic number

magic number

[ măjĭk ]


  1. Any of the numbers, 2, 8, 20, 28, 50, 82, or 126, that represent the number of neutrons or protons in strongly bound and exceptionally stable atomic nuclei. The existence of such stable nuclei is explained by assuming a shell structure for nucleons, much like the shell structure of electron orbitals around the nucleus.

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