/ Dictionary / Index R radiochromatography: Meaning and Definition of Find definitions for: ra•di•o•chro•ma•tog•ra•phy Pronunciation: (rā"dē-ō-krō"mu-tog'ru-fē), [key] — n. Chem. chromatography in which radiolabeled substances on the chromatogram are determined quantitatively or qualitatively by measuring their radioactivity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radiochemistry radio compass 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