/ Dictionary / Index B bioastronautics: Meaning and Definition of Find definitions for: bi•o•as•tro•nau•tics Pronunciation: (bī"ō-as"tru-nô'tiks), [key] — n. (used with a sing. v.) the science dealing with the effects of space travel on life. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bioassay bioautography Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language