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Definition of polonium
: a radioactive metallic element that is similar chemically to tellurium and bismuth, occurs especially in pitchblende and radium-lead residues, and emits an alpha particle to form an isotope of lead — see element table
From the M-W Editors
Recent Examples of polonium from the Web
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Their discovery of radioactive elements radium and polonium earned them the 1903 Nobel Prize in Physics, shared with Henri Becquerel.
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Speaking of Russia, these pics of Pooty-Poo goin’ fishin’ are worth their weight in polonium…
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'polonium'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of polonium
New Latin, from Medieval Latin Polonia
Medical Dictionary
polonium
playMedical Definition of polonium
: a radioactive metallic element that is similar chemically to tellurium and bismuth, occurs especially in pitchblende and radium-lead residues, and emits an alpha particle to form an isotope of lead—symbol Po; see element table
Learn More about polonium
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Britannica.com: Encyclopedia article about polonium
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