radium emanation
noun1
Obsolete Synonym of radon (“the isotope radon-222”).
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
noun
Obsolete Synonym of radon (“the isotope radon-222”).
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
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