Noun
British physicist who was born in Germany and fled Nazi persecution; in the 1940s he passed secret information to the USSR about the development of the atom bomb in the United States (1911-1988)
Source: WordNetIn Great Britain, Klaus Fuchs confessed to committing espionage on behalf of the Soviet Union while working on the Manhattan Project at Los Alamos National Laboratory during the War. Source: Internet
Philby had to help discover the identity of "Homer", but also wished to protect Maclean. citation In January 1950, on evidence provided by the Venona intercepts, Soviet atomic spy Klaus Fuchs was arrested. Source: Internet