English

Definition of americium noun from the Oxford Advanced Learner's Dictionary

 

americium

 noun
noun
BrE BrE//ˌæməˈrɪsiəm//
 
; NAmE NAmE//ˌæməˈrɪsiəm//
 
; BrE BrE//ˌæməˈrɪʃiəm//
 
; NAmE NAmE//ˌæməˈrɪʃiəm//
 
[uncountable] (symbol Am)
 
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a chemical element. Americium is a radioactive metal.
See the Oxford Advanced American Dictionary entry: americium