Actinium
/ækˈtɪniəm/
Definition 1 of 1
Pro Tip 1/3Science Context
Actinium is used in scientific or academic contexts, not common conversation. 
The researcher measured the actinium content in the sample.
Pro Tip 2/3Radioactivity Caution
Actinium is radioactive, so examples can involve radioactivity safety or nuclear science discussions. 
Wearing protective gear is essential when handling actinium in the lab.
Pro Tip 3/3Specialized Vocab
Actinium is part of specialized vocabulary used by professionals in fields like chemistry and physics. 
Marie Curie's work involved the study of radioactive elements like actinium.