/ Dictionary / Index R radiophone: Meaning and Definition of Find definitions for: ra•di•o•phone Pronunciation: (rā'dē-ō-fōn"), [key] — n. a radiotelephone. any of various devices for producing sound by the action of radiant energy. —v.t., v.i. to radiotelephone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: radiophone (Thesaurus) radiopharmaceutical radiophosphorus Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language