pro·me·thi·um
noun/prəˈmiːθiəm/
/prəˈmiːθiəm/
[uncountable] (symbol Pm)
- a chemical element. Promethium is a radioactive metal that was first produced artificially in a nuclear reactor and is found in small amounts in nature.
钷（放射性化学元素） Word Origin1940s: modern Latin, from the name of the Titan Prometheus, a demigod in Greek mythology who was worshipped by craftsmen.