fermi

Noun
  1. A metric unit of length equal to one quadrillionth of a meter (synset 113679309)
    is a type of: metric linear unit - a linear unit of distance in metric terms
    is a part of: micromicron, picometer, picometre - a metric unit of length equal to one trillionth of a meter
    same as: femtometer, femtometre
  2. 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) (synset 110989978)
    is an instance of: nuclear physicist - a physicist who specializes in nuclear physics
    same as: enrico fermi

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