Definition of polonium in English:

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Pronunciation: /pəˈləʊnɪəm/


[mass noun]
The chemical element of atomic number 84, a radioactive metal occurring in nature only as a product of radioactive decay of uranium. (Symbol: Po)
Example sentences
  • In the process, she discovered two new elements that are millions and billions of times more radioactive than uranium: radium and polonium.
  • Gentry had discovered that granites contain microscopic coloration halos produced by the radioactive decay of primordial polonium.
  • Radon can enter the body through the lungs, where it undergoes alpha decay to form polonium, a radioactive solid that remains in the lungs and continues to emit cancer-causing radiation.


Late 19th century: modern Latin, from medieval Latin Polonia 'Poland' (the native country of Marie Curie, the element's co-discoverer).

Words that rhyme with polonium

ammonium, euphonium, harmonium, pandemonium, pelargonium, plutonium, zirconium

For editors and proofreaders

Line breaks: po¦lo|nium

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