Definition of fermi
: a former SI unit of length equal to 10−15 centimeters : femtometer
Recent Examples of fermi from the Web
Fermi’s question, apparently raised during a lunch conversation at Los Alamos in the early 1950s, was a simple one: ‘‘
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Origin and Etymology of fermi
First Known Use: 1955See Words from the same year
Definition of Fermi
Enrico 1901–1954 American (Italian-born) physicist
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