/ Dictionary / Index R radioelement: Meaning and Definition of Find definitions for: ra•di•o•el•e•ment Pronunciation: (r?"d?-?-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: abscond Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language