Meaning of RADIO- in English

RADIO-

/ ˈreɪdiəʊ; NAmE -oʊ/ combining form (in nouns, adjectives and adverbs)

1.

connected with radio waves or broadcasting :

radio-controlled

2.

connected with radioactivity :

radiotherapy

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WORD ORIGIN

from radio or radius .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.