Neptunium

//nɛpˈtjuːniəm// noun

Definitions

Noun
  1. 1
    The transuranic chemical element with atomic number 93 and symbol Np. uncountable
  2. 2
    a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium wordnet

Etymology

From Neptune + -ium, after the planet. The previous element is uranium, named after the previous planet: Uranus.

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