A radioactive chemical element of the actinide series, atomic number 92, which is a dense, grey metal occurring esp. in the ores pitchblende and…
| 单词 | θ79508 |
| 释义 | the world > matter > physics > atomic nucleus > radioactivity > [noun] > uranium (3) uranium1790 A radioactive chemical element of the actinide series, atomic number 92, which is a dense, grey metal occurring esp. in the ores pitchblende and… uranium lead1914 (a) the isotope lead-206; = radium G n. at radium, n. 1b; (b) attributive (uranium-lead) designating a method of isotopic dating of rock based on… Subcategories:— native oxide of (1) |
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