/ Dictionary / Index U uncia: Meaning and Definition of Find definitions for: un•ci•a Pronunciation: (un'shē-u), [key] — pl. -ci•ae a bronze coin of ancient Rome, the 12th part of an as. (in prescriptions) an ounce of weight or volume. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. unchurched uncial Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language