This is not a dictionary! - Search for "neptunium" in The Danish Dictionary
January 15. 2013 from WordNet.dk
grundstof nr. 93; sølvlignende, radioaktivt metal ...
March 1. 2016 from wordnet.princeton.edu
a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium
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