| 单词 | didymium | 
| 释义 | Word Frequency didymium(daɪˈdɪmɪəm, dɪ-) noun 1.  a mixture of the metallic rare earths neodymium and praseodymium, once thought to be an element  2.  a mixture of rare earths and their oxides used in colouring glass  Word originC19: from New Latin, from Greek didumos twin + -ium | 
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