Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of radiophone is as below...

Radiophone :: Radiophone (n.) An apparatus for the production of sound by the action of luminous or thermal rays. It is essentially the same as the photophone.

Radiophony :: Radiophony (n.) The art or practice of using the radiophone.

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