radon

Meaning

Noun

The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas.
The most stable isotope of this element, .

Related

Similar words

emanation (definition 1)
exradio (definition 2)
niton (definition 1)

Origin

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

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