Meaning of RADIATION in English


n. 1 the act or an instance of radiating; the process of being radiated. 2 Physics a the emission of energy as electromagnetic waves or as moving particles. b the energy transmitted in this way, esp. invisibly. 3 (in full radiation therapy) treatment of cancer and other diseases using radiation, such as X-rays or ultraviolet light. radiation chemistry the study of the chemical effects of radiation on matter. radiation sickness sickness caused by exposure to radiation, such as X-rays or gamma rays. radiational adj. radiationally adv.

[ L radiatio (as RADIATE) ]

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.