/ Dictionary / Index Q quintic: Meaning and Definition of Find definitions for: quin•tic Pronunciation: (kwin'tik), [key] — Math. Math. —adj. of the fifth degree. —n. a quantity of the fifth degree. an equation of the fifth degree. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. quintet quintile 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