/ Dictionary / Index R radioacoustics: Meaning and Definition of Find definitions for: ra•di•o•a•cous•tics Pronunciation: (rā"dē-ō-u-k'stiks), [key] — n. (used with a sing. v.) the science and technology of the production, transmission, and reproduction of sounds carried by radio waves. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radio radioactinium Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language