Etymology
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polonium (n.)

radioactive metallic element, 1898, discovered by Marie Curie (nee Skłodowska), 1867-1934, and her husband, and named for her native country, Poland (Modern Latin Polonia). With element-name ending -ium.

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Definitions of polonium

polonium (n.)
a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor;
Synonyms: Po / atomic number "
From wordnet.princeton.edu