/ Dictionary / Index Q quadric surface: Meaning and Definition of Find definitions for: quad'ric sur'face Pronunciation: [key] a three-dimensional surface whose equation is a quadratic equation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. quadriceps quadricycle Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language