Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun americium

1 sense of americium

Sense 1
americium, Am, atomic number 95 -- (a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms)
       => metallic element, metal -- (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)