/ Dictionary / Index B bipetalous: Meaning and Definition of Find definitions for: bi•pet•al•ous Pronunciation: (bī-pet'l-us), [key] — adj. Bot. having two petals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bipedalism biphasic 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