WordNet (r) 3.0 (2006):

Otto Robert Frisch
    n 1: British physicist (born in Austria) who with Lise Meitner
         recognized that Otto Hahn had produced a new kind of
         nuclear reaction which they named nuclear fission; Frisch
         described the explosive potential of a chain nuclear
         reaction (1904-1979) [syn: Frisch, Otto Frisch, Otto
         Robert Frisch]