Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

Comprehensive
Dictionary Suite
Help
Help
Help
 
Advanced Dictionary    
Display options
 
Lookup History
neptunium

nep·tu·ni·um

neptunium

 
pronunciation:
nep tu ni m
part of speech: noun
definition: a synthetic radioactive chemical element of the actinide series that contains ninety-three protons in each nucleus. (symbol: Np)