(1877–1956), English physicist. He assisted William Ramsay in the discovery of helium and formulated a theory of isotopes, the word isotope being coined by him in 1913, after work on radioactive decay. Nobel Prize for Chemistry (1921).
Definition of Soddy, Frederick in US English:
Soddy, Frederick
proper nounˈsädē
(1877–1956), English physicist. He assisted William Ramsay in the discovery of helium, formulated a theory of isotopes, and coined the word isotope in 1913 after working on radioactive decay. Nobel Prize for Chemistry (1921).