Definition of radio- combining form from the Oxford Advanced American Dictionary

     

    radio-

     combining form
    combining form
    NAmE//ˈreɪdioʊ//
     
     
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  1. 1(in nouns, adjectives, and adverbs)
  2. 2connected with radio waves or broadcasting radio-controlled
  3. 3 connected with radioactivity or radiation radiotherapy
See the Oxford Advanced Learner's Dictionary entry: radio-