/ Dictionary / Index U unipetalous: Meaning and Definition of Find definitions for: u•ni•pet•al•ous Pronunciation: (y"nu-pet'l-us), [key] — adj. Bot. having only one petal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. unipersonal uniplanar Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language