/ Dictionary / Index B biunique: Meaning and Definition of Find definitions for: bi•u•nique Pronunciation: (bī"y-nēk'), [key] — adj. Math., Ling. one-to-one. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bituminous coal biuniqueness Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language