americium
ame·ri·cium
noun
1.
a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms
Origin
From Americ(as) + -ium, by analogy with europium.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.