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Definition of Fermi
1. Noun. A metric unit of length equal to one quadrillionth of a meter.
Exact synonyms: Femtometer, Femtometre
Generic synonyms: Metric Linear Unit
Group relationships: Micromicron, Picometer, Picometre
Generic synonyms: Metric Linear Unit
Group relationships: Micromicron, Picometer, Picometre
2. Noun. Italian 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).
Definition of Fermi
1. a unit of length [n -S]