Dictionary

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

cobalt 60

noun \-ˈsik-stē\   (Medical Dictionary)

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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