promethium
noun
- chemical element with the atomic number of 61
Wiktionary
Pronunciation: /pɹoʊˈmiːθiəm/
noun
Etymology: 1945. From the name of the Greek god Prometheus, who stole the fire from Mount Olympus and brought it down to mankind + -ium.
- A metallic chemical element (symbol Pm) with an atomic number of 61.