/ Dictionary / Index S syncline: Meaning and Definition of Find definitions for: syn•cline Pronunciation: (sing'klīn, sin'-), [key] — n. Geol. a synclinal fold. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. synclinal synclinorium Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language