Definitions
from The Century Dictionary.
- noun The name proposed by Sir William Ramsay for the radioactive, gaseous product produced by radium salts, which was first observed in 1900 by Dorn and afterward more carefully investigated by Rutherford, who called it the radium emanation.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun obsolete
Radon .
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
ex- + radio
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