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nouna metric unit of length equal to one quadrillionth of a meter
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type of:part of: -
nounItalian nuclear physicist (in the United States after 1939) who worked on artificial radioactivity caused by neutron bombardment and who headed the group that in 1942 produced the first controlled nuclear reaction (1901-1954)
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Definition that contains fermi
- fermion any particle that obeys Fermi-Dirac statistics and is subject to the Pauli exclusion principle