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radium B

noun

, Chemistry.
  1. an 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.

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Word History and Origins

Origin of radium B1

First recorded in 1900–05

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radium Aradium emanation

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