cobalt 60

noun

Definition of cobalt 60 

: a heavy radioactive isotope of cobalt of the mass number 60 produced in nuclear reactors and used as a source of gamma rays (as for radiotherapy)

First Known Use of cobalt 60

1946, in the meaning defined above

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The first known use of cobalt 60 was in 1946

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cobalt 60

noun
\-ˈsik-stē \

Medical Definition of cobalt 60 

: a heavy radioactive isotope of cobalt having the mass number 60 produced in nuclear reactors and used as a source of gamma rays especially in place of radium (as in the treatment of cancer and in radiography)

called also radiocobalt

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