| 单词 | radium |
| 释义 | radium /rāˈdi-əm/nounA radioactive metallic element (symbol Ra; atomic no 88) discovered by the Curies in 1898, found in pitchblende and other minerals, remarkable for its active spontaneous disintegration ORIGIN: L radius a ray radium A, B, etc noun Successive products in the disintegration of radon radium bomb noun An apparatus containing radium, emitting gamma rays for medical treatment (more commonly called teleradium unit) radium emanation noun Radon |
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