/ Dictionary / Index R radio compass: Meaning and Definition of Find definitions for: ra'dio com"pass Pronunciation: [key] a radio receiver with a directional antenna for determining the bearing of the receiver from a radio transmitter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radiochromatography radiodiagnosis Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language