/ Dictionary / Index S siècle d'or*: Meaning and Definition of Find definitions for: siè•cle d'or Pronunciation: (sye'kl dôr'), [key] — French. French. the period of the reign of Louis XIV of France. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. SIDS Siegbahn 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