From German - English Ding/FreeDict dictionary ver. 1.9-fd1: Actinium /aktˈiːniːˌʊm/ (Ac /ˈɑːk/) <neut, n, sg> [chem.] actinium <n>
Actinium /aktˈiːniːˌʊm/ (Ac /ˈɑːk/) <neut, n, sg> [chem.] actinium <n>