(n) radiation therapy
(n) radioactive contamination
(n) radiological attack
(n) radiation warning sign
trefoil
radiation warning symbol
(n) radiation leakage
(n) cosmic background radiation
(n) radioactive fallout
(n) radioisotope
(n) radioactive waste
(n) radiation genetics (study of the effects of radiation on genes)
(n) radiosensitivity
radiosensitive
(n) radiobiology
(n) radiation symbol
trefoil
radiation warning symbol
(n) medical radiographer
radiological technologist
(n) radiant energy
(n) radiation generator
(n) Cherenkov radiation
Cerenkov radiation
(n) synchrotron radiation
(n) radiocarbon dating
carbon-14 dating
(n) positron emission tomography
PET
(n) high level radioactive waste
(n) International Commission on Radiological Protection
ICRP