transcription, транскрипция: [ noun ]
Date: 1946
: 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)
COBALT 60
Meaning of COBALT 60 in English
Merriam-Webster's Collegiate English vocabulary. Энциклопедический словарь английского языка Merriam Webster. 2003