/ Dictionary / Index R radioautograph: Meaning and Definition of Find definitions for: ra•di•o•au•to•graph Pronunciation: (r?"d?-?-'tu-graf", -grf"), [key] ? n. autoradiograph. Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. radio astronomy radioautography 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