(1904–67), American theoretical physicist; full name Julius Robert Oppenheimer. He was director of the laboratory at Los Alamos during the development of the first atom bomb, but opposed the development of the hydrogen bomb after the Second World War.
Definition of Oppenheimer, J. Robert in US English:
Oppenheimer, J. Robert
proper nounˈäpənˌhīmər
(1904–67), US theoretical physicist; full name Julius Robert Oppenheimer. He was director of the laboratory at Los Alamos, New Mexico, during the development of the first atom bomb, but opposed the development of the hydrogen bomb after World War II.