Plutonium - definition, transcription

Amer.  |pluːˈtoʊniəm|
Brit.  |pluːˈtəʊnɪəm|


- a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239 (syn: plutonium, pu)


Uranium and plutonium are radioactive.

Plutonium 238 is one of the most toxic substances known to man.

a consignment of highly radioactive plutonium

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