English Explanatory Dictionary

plutonium

English dictionary entry

Meanings

noun
  1. The transuranic chemical element with atomic number 94 and symbol Pu: a silvery-gray fissile radioactive actinide metal that tarnishes when exposed to air.
  2. Alternative form of ploutonion.

Pronunciation

plo͞otō'nēəm /pluːˈtoʊniəm/ LL-Q1860 (eng)-Naomi Persephone Amethyst (NaomiAmethyst)-plutonium.wav en-us-plutonium.ogg

Word forms

plutonium plutoniums

Etymology

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

Related words

Pluto pluton Plutonian plutonic plutonism

Derived words

diplutonium nonplutonium organoplutonium plutonate plutoniferous plutonium-239 plutonium bomb plutonium dioxide plutonium enrichment plutonium hydride plutonium pit plutonyl reactor-grade plutonium transplutonium weapon-grade plutonium
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