n [U] [Date: 1800-1900; Language: Modern Latin; Origin: Latin radius; RADIUS]
a white metal that is radioactive and is used in the treatment of diseases such as cancer. It is a chemical element: symbol Ra
Similar Words
 - radiotelescope

 - radioteletype

 - radiotherapist

 - radiotherapy

 - radish

 * radium

 - radium therapy

 - radius

 - radix

 - radome

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