/ Dictionary / Index C curvilinear coordinate system: Meaning and Definition of Find definitions for: curvilin'ear coor'dinate sys"tem Pronunciation: [key] — Math. Math. a system of coordinates in which the coordinates are determined by three families of surfaces, usually perpendicular. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. curvilinear curvilinear tracery Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language