/ Dictionary / Index B biconcave: Meaning and Definition of Find definitions for: bi•con•cave Pronunciation: (bī-kon'kāv, bī"kon-kāv'), [key] — adj. concave on both sides, as a lens. See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: biconcave (Thesaurus) bicompact biconditional Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language