/ Dictionary / Index R radiochromatography: Meaning and Definition of Find definitions for: ra•di•o•chro•ma•tog•ra•phy Pronunciation: (r?"d?-?-kr?"mu-tog'ru-f?), [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: abdicate Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language