Definition of radium emanation in English:

radium emanation

Syllabification: ra·di·um em·a·na·tion

noun

archaic term for radon.
More example sentences
  • By 1900, Friedrich Dorn discovered the isotope radon - 222 and called it radium emanation (Em).
  • In 1921 Margaret Uhlig suggested that radium emanation, later known as Rn, may be the cause of the lung cancers.

Definition of radium emanation in:

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Word of the day apposite
Pronunciation: ˈapəzit
adjective
apt in the circumstances or relation to something