polonium:- 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 (Princeton WordNet 3.1)
polonium:- عنصر فلزي مشع، عدده الذري 84، ووزنه الذري 210 وهو يوجد في خامات اليورانيوم، ويعتبر مصدرا للقوة النووية، اكتشفه "بيير " و "ماري كوري" عام 1898. (معجم الكيمياء والصيدلة (ج٢))
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