/ Dictionary / Index R radiothermy: Meaning and Definition of Find definitions for: ra•di•o•ther•my Pronunciation: (rā'dē-ō-thûr"mē), [key] — n. Med. therapy that utilizes the heat from a shortwave radio apparatus or diathermy machine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radiotherapy radiothon Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language