Neptunium - Definition
neptunium
n 1: a radioactive transuranic metallic element; found in trace
amounts in uranium ores; a by-product of the production of
plutonium [syn: neptunium, Np, atomic number 93]
n 1: a radioactive transuranic metallic element; found in trace
amounts in uranium ores; a by-product of the production of
plutonium [syn: neptunium, Np, atomic number 93]