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DuckCorp Dico

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  1.                 From German - English Ding/FreeDict dictionary ver. 1.9-fd1:
                

    
                
                  
    Rubidium /ruːbˈiːdiːˌʊm/ (Rb /ˌɛɾbˈeː/) <neut, n, sg>
 [chem.] rubidium <n>