/ Dictionary / Index R radiotransparent: Meaning and Definition of Find definitions for: ra•di•o•trans•par•ent Pronunciation: (rā"dē-ō-trans-pâr'unt, -par'-), [key] — n. transparent to radiation; invisible in x-ray photographs and under fluoroscopy (opposed to radiopaque). Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radiotracer radio tube Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language