/ Dictionary / Index R radioelement: Meaning and Definition of Find definitions for: ra•di•o•el•e•ment Pronunciation: (rā"dē-ō-el'u-munt), [key] — n. Chem. a radioactive element. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radio direction finder Radio Free Europe/Radio Liberty Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language