/ Dictionary / Index R röntgeno-: Meaning and Definition of Find definitions for: röntgeno- Pronunciation: [key] var. ofröntgenoscope. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Röntgen ronyon Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language