Actinium

== German == === Pronunciation === === Noun === Actinium n (strong, genitive Actiniums, no plural) (chemistry) chemical element actinium (atomic number 89) ==== Declension ==== === See also === Previous: Radium, Next: Thorium === Further reading === “Actinium” in Duden online “Actinium” in Digitales Wörterbuch der deutschen Sprache == Luxembourgish == === Noun === Actinium m (uncountable) actinium