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fenuron
feoff
feoffee
feoffment
FEP
FEPA
FEPC
fer-de-lance
feral
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fermi
fer·mi [ fúrmee, férmee ] (plural fer·mis)


noun 
Definition:
 
very short unit of length: a unit of length used mainly for nuclear distances, equivalent to 10-15 m
[Early 20th century. After Enrico Fermi]
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