Definition: Meaning of, Joseph John Thomson in English to English dictionary.
Pronunciation:/ ˈdʒəʊzɪf dʒɒn ˈtɒmsən /
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1856-1940 english physicist who experimented with the conduction of electricity through gases and who discovered the electron and determined its charge and mass
1856-1940 english physicist who experimented with the conduction of electricity through gases and who discovered the electron and determined its charge and mass