/ Dictionary / Index U unicellular: Meaning and Definition of Find definitions for: u•ni•cel•lu•lar Pronunciation: (y"nu-sel'yu-lur), [key] — adj. having or consisting of a single cell. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unicellular (Thesaurus) UNICEF unicellulate Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language