Etymology

plutonium

P3L1U1T1O1N1I1U1M3

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

English Pluto ← Middle English Pluto ← Latin Plūtō
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The story

  1. Ancient Greekπλοῦτος (ploûtos)
  2. Ancient GreekΠλούτων (Ploútōn)
  3. LatinPlūtō
  4. Middle EnglishPluto
  5. EnglishPluto
  6. English todayplutonium

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

Etymology from Wiktionary, CC BY-SA 4.0.