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  1. Oxford Dictionary

    radiation

    • IPA[ˌreɪdɪˈeɪʃn]

    英式

    • n.
      the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.；the energy transmitted by radiation

    • noun: radiation, plural noun: radiations

    • 釋義

    名詞

    • 1. the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.
    • ▪ the energy transmitted by radiation background radiation the radiation dose
    • 2. divergence out from a central point, in particular evolution from an ancestral animal or plant group into a variety of new forms evolution is a process of radiation not progression