/ Dictionary / Index S synclinal: Meaning and Definition of Find definitions for: syn•cli•nal Pronunciation: (sin-klīn'l, sing-, sing'kli-nl), [key] — adj. sloping downward from opposite directions so as to meet in a common point or line. inclining upward on both sides from a median line or axis, as a downward fold of rock strata. pertaining to such a fold. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: synclinal (Thesaurus) synclastic syncline Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language