radiation
/ˌreɪdɪˈeɪʃən/noun
mass noun
1
- Physics the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization【物理】辐射, 辐射作用。
1.1
- the energy transmitted in this way辐射能; 放射线, 放射物; 核离子。
2
- chiefly Biology divergence out from a central point, in particular evolution from an ancestral animal or plant group into a variety of new forms【主生】辐射形进化, 发散状分化。
派生词
radiational
adjectiveradiationally
adverb词源
late Middle English (denoting the action of sending out rays of light)： from Latin radiatio（n-）, from radiare 'emit rays' （see RADIATE）.