radiation Meaning in the Cambridge English Dictionary
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Meaning of “radiation” in the English Dictionary

"radiation" in British English

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radiationnoun [U]

uk   us   /ˌreɪ.diˈeɪ.ʃən/
C1 a ​form of ​energy that comes from a ​nuclearreaction and that can be very ​dangerous to ​health: Many ​servicemensuffered radiation sickness after the early ​atomictests. energy from ​heat or ​light that you cannot ​see: microwave/​ultraviolet/​electromagnetic radiation
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(Definition of radiation from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"radiation" in American English

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radiationnoun [U]

 us   /ˌreɪ·diˈeɪ·ʃən/
physics energy in the ​form of waves or particles (= any of the ​smallestpieces of ​matter that make up ​atoms): Residents ​argued that ​electromagnetic radiation ​emitted by the ​radartowers might ​pose a ​healthhazard.
(the ​sending out of) ​heat, ​light, or ​energy in ​waves: solar radiation
(Definition of radiation from the Cambridge Academic Content Dictionary © Cambridge University Press)
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