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Dictionary

fer•mi•on

Pronunciation: (fûr'mē-on"), [key]
—n. Physics.
any particle that obeys the exclusion principle and Fermi-Dirac statistics; fermions have spins that are half an odd integer: ½, ³/2, ⁵/2, . …

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

Fermi-Dirac statistics

fermium

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