neptunium
nep·tu·ni·um
noun \nep-ˈtü-nē-əm, -ˈtyü-\Definition of NEPTUNIUM
: a radioactive metallic element that is chemically similar to uranium and is obtained in nuclear reactors especially as a by-product in the production of plutonium — see element table
See Origin of NEPTUNIUM
New Latin, from International Scientific Vocabulary Neptune
First Known Use: 1941
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