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feoffee
feoffment
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Fermat’s last theorem
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fermion

fer·mi·on [ fúrmee òn, férmee òn ] (plural fer·mi·ons)


noun 
Definition:
 
elementary particle: an elementary particle with a half-integral spin that obeys the Pauli exclusion principle. Electrons, protons, and neutrons are types of fermions.

[After Enrico Fermi]
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