What does "americium" mean?

The chemical element (symbol Am) with an atomic number of 95.

What is a synonym for "americium"?

Common synonyms include: am, am-241, americium element, atomic number 95, element, gold.

Pronounced //ˌæməˈɹɪsiəm//.

/ˌæməˈɹɪsiəm/ noun

noun ·Rare ·Advanced level

Noun

1
The chemical element (symbol Am) with an atomic number of 95. uncountable, usually
2
a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms wordnet

"Even thin sheets of Americium-241 can sustain a chain reaction."

From Americ(as) + -ium, by analogy with europium.