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Definition of Polonium in English :

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Polonium meaning in English

Meaning of Polonium in English

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Polonium

see synonyms of polonium

Noun

1. atomic number 84, po, 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

WordNet Lexical Database for English. Princeton University. 2010.

Polonium

see synonyms of polonium
noun
a very rare radioactive element that occurs in trace amounts in uranium ores. The isotope polonium-210 is produced artificially and is used as a lightweight power source in satellites and to eliminate static electricity in certain industries. Symbol: Po; atomic no: 84; half-life of most stable isotope, 209Po: 103 years; valency: –2, 0, 2, 4, or 6; relative density (alpha modification): 9.32; melting pt: 254°C; boiling pt: 962°C

Collins English Dictionary. Copyright © HarperCollins Publishers

Polonium

see synonyms of polonium
noun
a radioactive, nonmetallic chemical element formed naturally by the disintegration of radium or synthetically by the neutron irradiation of bismuth followed by beta decay: used as a power source in space satellites, as an aid in inducing electric discharges, etc.: symbol, Po; at. no., 84
see the periodic table of elements in the Reference Supplement

Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.

Polonium

see synonyms of polonium
n. Symbol Po
A radioactive metallic element, occurring naturally in small quantities as a product of radium disintegration and produced synthetically by bombarding bismuth or lead with neutrons. Most isotopes decay by alpha-particle emission; the most stable are Po-208 and Po-209, with half-lives of 2.9 years and 102 years, respectively. Po-210, with a half-life of 138.4 days, is the most readily available isotope and is extremely toxic. Atomic number 84; melting point 254°C; boiling point 962°C; specific gravity 9.20; valence 2, 4, 6. See Periodic Table.

The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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