radiation

英語（米国） (en-US) 英語（イギリス） (en-GB)

IPA（発音記号）

/ˌɹeɪ.di.ˈeɪ.ʃən/

名詞

可算名詞 不可算名詞

The shooting forth of anything from a point or surface, like diverging rays of light. / The process of radiating waves or particles. / The transfer of energy via radiation. / Radioactive energy.

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At sunrise the radiation from the horizon painted the valley with long golden beams.

詳細

意味（1）

The shooting forth of anything from a point or surface, like diverging rays of light.

heat radiation

詳細

意味（2）

The process of radiating waves or particles.

意味（3）

The transfer of energy via radiation.

意味（4）

Radioactive energy.

It's Christmas at ground zero / And if the radiation level's OK / I'll go out with you / To see all the new / Mutations on New Year's Day

詳細

意味（5）

(evolutionary theory, countable) A rapid diversification of an ancestral species into many new forms.

So the question is: have plants and animals retained over this huge amount of time—whole radiations of mammals have come and gone in this period—have they retained these potentially costly characteristics?

詳細

radiations （ 複数形 ）