English Explanatory Dictionary

radon

English dictionary entry

Meanings

noun
  1. The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas.
  2. Radon-222 (22286Rn), the most stable isotope of said element.
name
  1. A surname from German.
  2. Johann Radon (1887-1956), an Austrian mathematician with results in measure theory, functional analysis and geometry.

Pronunciation

rā'dŏn /ˈɹeɪdɒn/ LL-Q1860 (eng)-Vealhurl-radon.wav LL-Q1860 (eng)-Naomi Persephone Amethyst (NaomiAmethyst)-radon.wav

Word forms

radon

Etymology

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

Synonyms

emanation niton exradio radeon radium emanation

Related words

radium actinon radium emanation

Derived words

eka-radon nonradon radonate radon difluoride radon fluoride radonproof radon seed Radon measure Radon point Radon transform
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