WordReference Random House Unabridged Dictionary of American English © 2020
radium B, [Chem.]
  1. Chemistryan isotope of lead, formed by decay of radium A, that gives rise to radium C, which is an isotope of bismuth, from which radium D, radium E, and radium F, or polonium 210, are derived.
  • 1900–05

'radium B' also found in these entries (note: many are not synonyms or translations):
Report an inappropriate ad.