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Radon

//ˈɹeɪdɒn// name, noun

Definitions

Proper Noun
  1. 1
    A surname from German.
  2. 2
    A surname from German.; Johann Radon (1887-1956), an Austrian mathematician with results in measure theory, functional analysis and geometry.
Noun
  1. 1
    The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas. uncountable
  2. 2
    a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health wordnet
  3. 3
    Radon-222 (²²²₈₆Rn), the most stable isotope of said element. uncountable

Etymology

Contraction of radium emanation, since the element appears in the radioactive decay of radium. By surface analysis, radio- + -on (“suffix for noble gases”).

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