noun Etymology: New Latin, from America + New Latin -ium Date: 1946 a radioactive metallic element produced artificially by bombarding plutonium with high-energy neutrons
AMERICIUM
Meaning of AMERICIUM in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012