| Czech | aktinium |
| Chinese (simplified) | 锕 , 金阿 |
| English | actinium , Ac , atomic number 89 |
| Indonesian | aktinium , unsur radioaktif dari seri aktinida |
| Italian | attinio |
| Japanese | アクチニウム |
| Malaysian | aktinium |
| Hypernym: | chemical_element |
| Holonym–Substance: | uranium_ore |
| Semantic Field: | substancen |