/ Dictionary / Index S synclinorium: Meaning and Definition of Find definitions for: syn•cli•no•ri•um Pronunciation: (sing"klu-nôr'ē-um, -nōr'-), [key] — pl. -no•ri•a -no•ri•ums. a regional structure of general synclinal form that includes a series of smaller folds. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. syncline Syncom 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