Dictionary

plutonium

plutonium

noun plu·to·ni·um \plü-ˈtō-nē-əm\

: a radioactive element that is used to make nuclear energy and nuclear weapons

Full Definition of PLUTONIUM

:  a radioactive metallic element similar chemically to uranium that is formed as the isotope 239 by decay of neptunium and found in minute quantities in pitchblende, that undergoes slow disintegration with the emission of an alpha particle to form uranium 235, and that is fissionable with slow neutrons to yield atomic energy — see element table

Origin of PLUTONIUM

New Latin, from Pluton-, Pluto, the planet Pluto
First Known Use: 1942

Rhymes with PLUTONIUM

plutonium

noun plu·to·ni·um \plü-ˈtō-nē-əm\   (Medical Dictionary)

Medical Definition of PLUTONIUM

:  a radioactive metallic element similar chemically to uranium that is formed as the isotope 239 by decay of neptunium and found in minute quantities in pitchblende, that undergoes slow disintegration with the emission of an alpha particle to form uranium 235, and that is fissionable with slow neutrons to yield atomic energy—symbol Pu; see element table

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