plutonium

Meanings

1. 1
   noun

   The transuranic chemical element with atomic number 94 and symbol Pu: a silvery-gray fissile radioactive actinide metal that tarnishes when exposed to air.

   Plutonium? You mean this sucker's nuclear?

2. 2
   noun

   a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons

After Pluto (dwarf planet) + -n- + -ium. More in Wikipedia at plutonium § History.

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