Radon Definition

rādŏn
noun
A radioactive, gaseous chemical element, one of the noble gases, formed, together with alpha rays, as a first product in the atomic disintegration of radium: symbol, Rn; at. no. 86
Webster's New World
Synonyms:
  • atomic number 86
  • rn
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Origin of Radon

  • Contraction of radium emanation, since the element appears in the radioactive decay of radium.

    From Wiktionary

  • rad(ium) –on

    From American Heritage Dictionary of the English Language, 5th Edition

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