Fermi,
Enrico 1901-54; U.S. nuclear physicist, born in Italy
See fermi in American Heritage Dictionary 4
(fûrˈmē, fĕrˈ-)
nounpl.fer·mis
A unit of length equal to one femtometer (10-15 meter).
(fĕrˈmē), Enrico 1901-1954.
Italian-born American physicist. He won a 1938 Nobel Prize for his work on artificial radioactivity caused by neutron bombardment. In 1942, at the University of Chicago, he produced the first controlled nuclear chain reaction.