a ray or single particle of alpha radiation; (attributive or in plural) alpha radiation.
| 单词 | θ79385 | 
| 释义 | the world > matter > physics > atomic nucleus > radioactivity > alpha radiation > 			[noun]		 > ray of (1)		 alpha ray1902 a ray or single particle of alpha radiation; (attributive or in plural) alpha radiation. | 
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