fermi

[fur-mee; Italian fer-mee] /ˈfɜr mi; Italian ˈfɛr mi/
noun, Physics.
1.
a unit of length, 10− 15 m, used in measuring nuclear distances. Symbol: F.
Also called femtometer.
Origin
named after E. Fermi

Fermi

[fur-mee; Italian fer-mee] /ˈfɜr mi; Italian ˈfɛr mi/
noun
1.
Enrico
[en-ree-koh;; Italian en-ree-kaw] /ɛnˈri koʊ;; Italian ɛnˈri kɔ/ (Show IPA), 1901–54, Italian physicist, in the U.S. after 1939: Nobel Prize 1938.
British Dictionary definitions for fermi

fermi

/ˈfɜːmɪ/
noun
1.
a unit of length used in nuclear physics equal to 10–15 metre
Word Origin
C20: named after Enrico Fermi

Fermi

/ˈfɜːmɪ; Italian ˈfɛrmi/
noun
1.
Enrico (enˈriːko). 1901-54, Italian nuclear physicist, in the US from 1939. He was awarded a Nobel prize for physics in 1938 for his work on radioactive substances and nuclear bombardment and headed the group that produced the first controlled nuclear reaction (1942)
fermi in Science
Fermi
  (fěr'mē)   
Italian-born American physicist who won a 1938 Nobel Prize for his research on neutrons. In 1942, with Leo Szilard, Fermi built the world's first nuclear reactor. He also discovered over 40 new isotopes, including the element fermium, which is named for him.