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radium A
noun
, Chemistry.
- a substance, formed by decay of radon, that gives rise to radium B.
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Word History and Origins
Origin of radium A1
First recorded in 1900–05
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Example Sentences
Katie Hafner: He told Meitner that where he'd expected to see radium, a heavy metal, he was instead finding barium, a much lighter element.
From Scientific American
She had radium - a radioactive substance - sewn into her cervix to try to kill off the tumour.
From BBC
Researchers have found high levels of radium, a radioactive element that increases the risk of different types of cancer, downstream of the facilities' outlets.
From Salon
It contained radium, a highly radioactive element, and the stuff was inescapable.
From Seattle Times
The active ingredient in these drinks was radium, a radioactive element that releases a packet of radiant energy with every atomic decay.
From Salon
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