Meaning of radium

ra•di•um

Pronunciation: (rā'dē-um), [key]
— n.
  1. a highly radioactive metallic element whose decay yields radon gas and alpha rays. Symbol: Ra; at. wt.: 226; at. no.: 88.
  2. a lustrous rayon or silk fabric constructed in plain weave and used in women's apparel, lining, and drapery.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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