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Noun: fermi  fur-mee
  1. A metric unit of length equal to one quadrillionth of a meter
    "The size of an atomic nucleus is measured in fermis";
    - femtometer [US], femtometre [Brit, Cdn]
Noun: Fermi  fur-mee
  1. 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)
    - Enrico Fermi

Derived forms: fermis

Type of: metric linear unit, nuclear physicist

Part of: micromicron, picometer [US], picometre [Brit, Cdn]

Encyclopedia: Fermi, Enrico