/ Dictionary / Index B biradial: Meaning and Definition of Find definitions for: bi•ra•di•al Pronunciation: (bī-rā'dē-ul), [key] — adj. Biol. having both bilateral and radial symmetry, as ctenophores. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: biradial (Thesaurus) biracial biradical Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language