RADON

radon, Rn, atomic number

(noun) 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

Source: WordNet® 3.1


Etymology

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

Noun

radon (uncountable)

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, 22286Rn.

Synonyms

• emanation (obsolete) (definition 1)

• exradio (archaic) (definition 2)

• niton (obsolete) (definition 1)

Anagrams

• Ardon, Daron, Doran, Drona, NORAD, Nador, Nardo, Ronda, adorn, and/or, andro, andro-, norad, rando

Source: Wiktionary



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Word of the Day

29 May 2025

CRITICAL

(adjective) characterized by careful evaluation and judgment; “a critical reading”; “a critical dissertation”; “a critical analysis of Melville’s writings”


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