/ Dictionary / Index U uraniscus: Meaning and Definition of Find definitions for: u•ra•nis•cus Pronunciation: (yoor"u-nis'kus), [key] — pl. -nis•ci a starlike ornament, as in a coffer of a ceiling. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. uraninite uranite Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language